/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-new/gauss_sum.i.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 00:12:19,965 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 00:12:19,966 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 00:12:19,985 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 00:12:20,005 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 00:12:20,006 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 00:12:20,006 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 00:12:20,007 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 [2021-05-06 00:12:20,021 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 00:12:20,021 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 00:12:20,022 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 00:12:20,022 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 00:12:20,022 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 00:12:20,023 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 00:12:20,023 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 00:12:20,023 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 00:12:20,023 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 00:12:20,023 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 00:12:20,023 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 00:12:20,023 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 00:12:20,024 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 00:12:20,024 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 00:12:20,024 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 00:12:20,024 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 00:12:20,024 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 00:12:20,024 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 00:12:20,024 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 00:12:20,025 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 00:12:20,025 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 00:12:20,025 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 00:12:20,025 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 00:12:20,025 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 00:12:20,025 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 00:12:20,025 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 00:12:20,026 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 00:12:20,026 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 00:12:20,026 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 00:12:20,242 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 00:12:20,260 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 00:12:20,262 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 00:12:20,263 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 00:12:20,263 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 00:12:20,264 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/gauss_sum.i.v+cfa-reducer.c [2021-05-06 00:12:20,313 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/77989af8c/1fc4b07791ef4e5ea6709d2b389c09c5/FLAG096de8278 [2021-05-06 00:12:20,679 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 00:12:20,680 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/gauss_sum.i.v+cfa-reducer.c [2021-05-06 00:12:20,684 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/77989af8c/1fc4b07791ef4e5ea6709d2b389c09c5/FLAG096de8278 [2021-05-06 00:12:20,699 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/77989af8c/1fc4b07791ef4e5ea6709d2b389c09c5 [2021-05-06 00:12:20,702 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 00:12:20,704 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 00:12:20,705 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 00:12:20,705 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 00:12:20,708 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 00:12:20,708 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 12:12:20" (1/1) ... [2021-05-06 00:12:20,709 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7afd4a24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:12:20, skipping insertion in model container [2021-05-06 00:12:20,709 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 12:12:20" (1/1) ... [2021-05-06 00:12:20,713 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 00:12:20,726 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 00:12:20,841 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-new/gauss_sum.i.v+cfa-reducer.c[1014,1027] [2021-05-06 00:12:20,845 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 00:12:20,852 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 00:12:20,883 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-new/gauss_sum.i.v+cfa-reducer.c[1014,1027] [2021-05-06 00:12:20,889 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 00:12:20,899 INFO L208 MainTranslator]: Completed translation [2021-05-06 00:12:20,899 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:12:20 WrapperNode [2021-05-06 00:12:20,899 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 00:12:20,900 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 00:12:20,902 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 00:12:20,902 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 00:12:20,909 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:12:20" (1/1) ... [2021-05-06 00:12:20,909 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:12:20" (1/1) ... [2021-05-06 00:12:20,913 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:12:20" (1/1) ... [2021-05-06 00:12:20,914 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:12:20" (1/1) ... [2021-05-06 00:12:20,923 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:12:20" (1/1) ... [2021-05-06 00:12:20,925 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:12:20" (1/1) ... [2021-05-06 00:12:20,926 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:12:20" (1/1) ... [2021-05-06 00:12:20,930 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 00:12:20,931 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 00:12:20,931 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 00:12:20,931 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 00:12:20,932 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:12:20" (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 [2021-05-06 00:12:20,994 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 00:12:20,994 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 00:12:20,994 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 00:12:20,994 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 00:12:20,994 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 00:12:20,994 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 00:12:20,995 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 00:12:20,995 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 00:12:20,995 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 00:12:20,995 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 00:12:20,995 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 00:12:20,996 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 00:12:20,996 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 00:12:20,996 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 00:12:20,997 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 00:12:20,997 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 00:12:20,997 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 00:12:20,997 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 00:12:20,997 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 00:12:21,151 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 00:12:21,151 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-05-06 00:12:21,152 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 12:12:21 BoogieIcfgContainer [2021-05-06 00:12:21,152 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 00:12:21,153 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 00:12:21,153 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 00:12:21,155 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 00:12:21,155 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 12:12:20" (1/3) ... [2021-05-06 00:12:21,156 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@356be4c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 12:12:21, skipping insertion in model container [2021-05-06 00:12:21,156 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:12:20" (2/3) ... [2021-05-06 00:12:21,156 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@356be4c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 12:12:21, skipping insertion in model container [2021-05-06 00:12:21,156 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 12:12:21" (3/3) ... [2021-05-06 00:12:21,157 INFO L111 eAbstractionObserver]: Analyzing ICFG gauss_sum.i.v+cfa-reducer.c [2021-05-06 00:12:21,176 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 00:12:21,179 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 00:12:21,189 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 00:12:21,210 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 00:12:21,213 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 00:12:21,213 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 00:12:21,213 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 00:12:21,213 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 00:12:21,213 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 00:12:21,213 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 00:12:21,213 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 00:12:21,236 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 00:12:21,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-06 00:12:21,238 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:12:21,238 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:12:21,239 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:12:21,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:12:21,242 INFO L82 PathProgramCache]: Analyzing trace with hash -1088558671, now seen corresponding path program 1 times [2021-05-06 00:12:21,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:12:21,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887821473] [2021-05-06 00:12:21,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:12:21,309 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:12:21,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1658268897] [2021-05-06 00:12:21,310 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 [2021-05-06 00:12:21,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 00:12:21,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-06 00:12:21,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:12:21,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:21,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:12:21,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:12:21,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887821473] [2021-05-06 00:12:21,482 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:12:21,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658268897] [2021-05-06 00:12:21,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658268897] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 00:12:21,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 00:12:21,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 00:12:21,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874712298] [2021-05-06 00:12:21,486 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 00:12:21,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:12:21,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 00:12:21,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-06 00:12:21,499 INFO L87 Difference]: Start difference. First operand has 16 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:21,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:12:21,530 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2021-05-06 00:12:21,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 00:12:21,531 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-06 00:12:21,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:12:21,536 INFO L225 Difference]: With dead ends: 26 [2021-05-06 00:12:21,536 INFO L226 Difference]: Without dead ends: 13 [2021-05-06 00:12:21,538 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.3ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-06 00:12:21,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-05-06 00:12:21,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-05-06 00:12:21,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:21,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2021-05-06 00:12:21,559 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2021-05-06 00:12:21,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:12:21,559 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2021-05-06 00:12:21,559 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:21,559 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2021-05-06 00:12:21,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 00:12:21,560 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:12:21,560 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:12:21,777 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-05-06 00:12:21,778 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:12:21,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:12:21,778 INFO L82 PathProgramCache]: Analyzing trace with hash 614357099, now seen corresponding path program 1 times [2021-05-06 00:12:21,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:12:21,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295611835] [2021-05-06 00:12:21,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:12:21,793 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:12:21,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [824894447] [2021-05-06 00:12:21,793 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 [2021-05-06 00:12:21,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 00:12:21,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 00:12:21,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:12:21,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:21,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:21,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:21,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:21,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:12:21,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:12:21,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295611835] [2021-05-06 00:12:21,970 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:12:21,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824894447] [2021-05-06 00:12:21,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824894447] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:12:21,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:12:21,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 00:12:21,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957572880] [2021-05-06 00:12:21,971 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 00:12:21,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:12:21,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 00:12:21,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 00:12:21,972 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand has 6 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:22,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:12:22,007 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2021-05-06 00:12:22,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 00:12:22,008 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-06 00:12:22,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:12:22,008 INFO L225 Difference]: With dead ends: 17 [2021-05-06 00:12:22,008 INFO L226 Difference]: Without dead ends: 14 [2021-05-06 00:12:22,009 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 43.0ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-05-06 00:12:22,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-05-06 00:12:22,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-05-06 00:12:22,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:22,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2021-05-06 00:12:22,011 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2021-05-06 00:12:22,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:12:22,011 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2021-05-06 00:12:22,011 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:22,011 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2021-05-06 00:12:22,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-06 00:12:22,012 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:12:22,012 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:12:22,230 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:12:22,231 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:12:22,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:12:22,231 INFO L82 PathProgramCache]: Analyzing trace with hash 1865138417, now seen corresponding path program 2 times [2021-05-06 00:12:22,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:12:22,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064934211] [2021-05-06 00:12:22,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:12:22,251 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:12:22,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1551977551] [2021-05-06 00:12:22,251 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 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 [2021-05-06 00:12:22,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 00:12:22,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:12:22,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 00:12:22,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:12:22,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:22,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:22,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:22,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:22,399 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:12:22,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:12:22,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064934211] [2021-05-06 00:12:22,400 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:12:22,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551977551] [2021-05-06 00:12:22,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551977551] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:12:22,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:12:22,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 00:12:22,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344935941] [2021-05-06 00:12:22,400 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 00:12:22,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:12:22,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 00:12:22,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 00:12:22,401 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:22,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:12:22,429 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2021-05-06 00:12:22,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 00:12:22,430 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-05-06 00:12:22,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:12:22,430 INFO L225 Difference]: With dead ends: 18 [2021-05-06 00:12:22,430 INFO L226 Difference]: Without dead ends: 15 [2021-05-06 00:12:22,431 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.7ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 00:12:22,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-05-06 00:12:22,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-05-06 00:12:22,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:22,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2021-05-06 00:12:22,434 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2021-05-06 00:12:22,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:12:22,434 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2021-05-06 00:12:22,435 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:22,435 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2021-05-06 00:12:22,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-06 00:12:22,435 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:12:22,435 INFO L523 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:12:22,652 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:12:22,652 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:12:22,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:12:22,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1984653611, now seen corresponding path program 3 times [2021-05-06 00:12:22,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:12:22,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621280812] [2021-05-06 00:12:22,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:12:22,671 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:12:22,671 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [689800541] [2021-05-06 00:12:22,671 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 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 [2021-05-06 00:12:22,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 00:12:22,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:12:22,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-06 00:12:22,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:12:22,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:22,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:22,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:22,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:22,840 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:12:22,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:12:22,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621280812] [2021-05-06 00:12:22,840 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:12:22,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689800541] [2021-05-06 00:12:22,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689800541] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:12:22,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:12:22,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 00:12:22,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793656040] [2021-05-06 00:12:22,841 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 00:12:22,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:12:22,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 00:12:22,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 00:12:22,842 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:22,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:12:22,871 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2021-05-06 00:12:22,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 00:12:22,871 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-05-06 00:12:22,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:12:22,871 INFO L225 Difference]: With dead ends: 19 [2021-05-06 00:12:22,872 INFO L226 Difference]: Without dead ends: 16 [2021-05-06 00:12:22,872 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.3ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 00:12:22,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-05-06 00:12:22,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-05-06 00:12:22,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 12 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:22,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2021-05-06 00:12:22,874 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2021-05-06 00:12:22,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:12:22,874 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2021-05-06 00:12:22,874 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:22,874 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2021-05-06 00:12:22,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-06 00:12:22,875 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:12:22,875 INFO L523 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:12:23,090 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:12:23,091 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:12:23,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:12:23,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1394657329, now seen corresponding path program 4 times [2021-05-06 00:12:23,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:12:23,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089921453] [2021-05-06 00:12:23,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:12:23,101 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:12:23,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1024405743] [2021-05-06 00:12:23,102 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2021-05-06 00:12:23,145 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 00:12:23,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:12:23,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-06 00:12:23,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:12:23,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:23,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:23,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:23,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:23,246 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:12:23,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:12:23,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089921453] [2021-05-06 00:12:23,247 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:12:23,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024405743] [2021-05-06 00:12:23,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024405743] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:12:23,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:12:23,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 00:12:23,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973149707] [2021-05-06 00:12:23,247 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 00:12:23,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:12:23,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 00:12:23,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-05-06 00:12:23,248 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand has 9 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:23,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:12:23,287 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2021-05-06 00:12:23,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 00:12:23,287 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-05-06 00:12:23,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:12:23,288 INFO L225 Difference]: With dead ends: 20 [2021-05-06 00:12:23,288 INFO L226 Difference]: Without dead ends: 17 [2021-05-06 00:12:23,288 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 53.6ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-06 00:12:23,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-05-06 00:12:23,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-05-06 00:12:23,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 13 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:23,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2021-05-06 00:12:23,290 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2021-05-06 00:12:23,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:12:23,290 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2021-05-06 00:12:23,290 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:23,290 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2021-05-06 00:12:23,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-06 00:12:23,290 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:12:23,291 INFO L523 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:12:23,498 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-06 00:12:23,498 INFO L428 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:12:23,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:12:23,498 INFO L82 PathProgramCache]: Analyzing trace with hash 284641771, now seen corresponding path program 5 times [2021-05-06 00:12:23,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:12:23,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696368517] [2021-05-06 00:12:23,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:12:23,513 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:12:23,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [228241087] [2021-05-06 00:12:23,514 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2021-05-06 00:12:23,559 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-06 00:12:23,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:12:23,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-06 00:12:23,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:12:23,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:23,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:23,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:23,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:23,643 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:12:23,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:12:23,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696368517] [2021-05-06 00:12:23,643 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:12:23,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228241087] [2021-05-06 00:12:23,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228241087] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:12:23,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:12:23,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 00:12:23,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466772639] [2021-05-06 00:12:23,644 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 00:12:23,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:12:23,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 00:12:23,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-05-06 00:12:23,644 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:23,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:12:23,702 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2021-05-06 00:12:23,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 00:12:23,703 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-05-06 00:12:23,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:12:23,703 INFO L225 Difference]: With dead ends: 21 [2021-05-06 00:12:23,703 INFO L226 Difference]: Without dead ends: 18 [2021-05-06 00:12:23,704 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 50.4ms TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 00:12:23,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-05-06 00:12:23,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-05-06 00:12:23,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:23,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2021-05-06 00:12:23,706 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2021-05-06 00:12:23,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:12:23,706 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2021-05-06 00:12:23,706 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:23,706 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2021-05-06 00:12:23,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 00:12:23,706 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:12:23,706 INFO L523 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:12:23,917 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:12:23,917 INFO L428 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:12:23,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:12:23,917 INFO L82 PathProgramCache]: Analyzing trace with hash 233897841, now seen corresponding path program 6 times [2021-05-06 00:12:23,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:12:23,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957901362] [2021-05-06 00:12:23,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:12:23,932 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:12:23,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [530427116] [2021-05-06 00:12:23,932 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2021-05-06 00:12:23,987 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-06 00:12:23,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:12:23,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-06 00:12:23,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:12:24,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:24,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:24,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:24,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:24,090 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:12:24,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:12:24,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957901362] [2021-05-06 00:12:24,091 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:12:24,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530427116] [2021-05-06 00:12:24,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530427116] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:12:24,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:12:24,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 00:12:24,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984678225] [2021-05-06 00:12:24,091 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 00:12:24,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:12:24,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 00:12:24,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-05-06 00:12:24,092 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand has 10 states, 10 states have (on average 1.4) internal successors, (14), 10 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:24,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:12:24,136 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2021-05-06 00:12:24,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 00:12:24,136 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.4) internal successors, (14), 10 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-05-06 00:12:24,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:12:24,137 INFO L225 Difference]: With dead ends: 22 [2021-05-06 00:12:24,137 INFO L226 Difference]: Without dead ends: 19 [2021-05-06 00:12:24,137 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 62.2ms TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-05-06 00:12:24,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-05-06 00:12:24,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-05-06 00:12:24,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:24,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2021-05-06 00:12:24,139 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2021-05-06 00:12:24,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:12:24,140 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2021-05-06 00:12:24,140 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.4) internal successors, (14), 10 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:24,140 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2021-05-06 00:12:24,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 00:12:24,140 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:12:24,140 INFO L523 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:12:24,356 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-06 00:12:24,357 INFO L428 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:12:24,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:12:24,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1339163989, now seen corresponding path program 7 times [2021-05-06 00:12:24,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:12:24,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944112491] [2021-05-06 00:12:24,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:12:24,365 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:12:24,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1999300161] [2021-05-06 00:12:24,365 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-05-06 00:12:24,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 00:12:24,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-06 00:12:24,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:12:24,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:24,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:24,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:24,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:24,521 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:12:24,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:12:24,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944112491] [2021-05-06 00:12:24,521 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:12:24,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999300161] [2021-05-06 00:12:24,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999300161] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:12:24,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:12:24,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 00:12:24,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691475981] [2021-05-06 00:12:24,522 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 00:12:24,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:12:24,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 00:12:24,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-05-06 00:12:24,523 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:24,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:12:24,584 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2021-05-06 00:12:24,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 00:12:24,585 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-05-06 00:12:24,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:12:24,585 INFO L225 Difference]: With dead ends: 23 [2021-05-06 00:12:24,585 INFO L226 Difference]: Without dead ends: 20 [2021-05-06 00:12:24,585 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 68.6ms TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-05-06 00:12:24,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-05-06 00:12:24,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-05-06 00:12:24,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 16 states have (on average 1.0625) internal successors, (17), 16 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:24,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2021-05-06 00:12:24,588 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2021-05-06 00:12:24,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:12:24,588 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2021-05-06 00:12:24,588 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:24,588 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2021-05-06 00:12:24,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-06 00:12:24,588 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:12:24,588 INFO L523 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:12:24,804 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:12:24,805 INFO L428 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:12:24,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:12:24,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1435526833, now seen corresponding path program 8 times [2021-05-06 00:12:24,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:12:24,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962676758] [2021-05-06 00:12:24,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:12:24,812 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:12:24,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [970693065] [2021-05-06 00:12:24,813 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 [2021-05-06 00:12:24,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 00:12:24,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:12:24,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-06 00:12:24,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:12:24,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:24,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:24,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:24,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:25,005 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:12:25,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:12:25,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962676758] [2021-05-06 00:12:25,006 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:12:25,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970693065] [2021-05-06 00:12:25,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970693065] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:12:25,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:12:25,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 00:12:25,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925450523] [2021-05-06 00:12:25,006 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 00:12:25,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:12:25,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 00:12:25,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-05-06 00:12:25,007 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand has 12 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:25,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:12:25,076 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2021-05-06 00:12:25,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 00:12:25,076 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-05-06 00:12:25,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:12:25,077 INFO L225 Difference]: With dead ends: 24 [2021-05-06 00:12:25,077 INFO L226 Difference]: Without dead ends: 21 [2021-05-06 00:12:25,077 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 97.0ms TimeCoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-05-06 00:12:25,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-05-06 00:12:25,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-05-06 00:12:25,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 17 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:25,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2021-05-06 00:12:25,079 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2021-05-06 00:12:25,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:12:25,080 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2021-05-06 00:12:25,080 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:25,080 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2021-05-06 00:12:25,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-06 00:12:25,080 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:12:25,080 INFO L523 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:12:25,296 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:12:25,297 INFO L428 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:12:25,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:12:25,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1551596395, now seen corresponding path program 9 times [2021-05-06 00:12:25,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:12:25,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721782785] [2021-05-06 00:12:25,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:12:25,306 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:12:25,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2050603430] [2021-05-06 00:12:25,306 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:12:25,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-06 00:12:25,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:12:25,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-06 00:12:25,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:12:25,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:25,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:25,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:25,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:25,508 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:12:25,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:12:25,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721782785] [2021-05-06 00:12:25,509 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:12:25,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050603430] [2021-05-06 00:12:25,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050603430] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:12:25,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:12:25,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 00:12:25,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342425052] [2021-05-06 00:12:25,509 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 00:12:25,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:12:25,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 00:12:25,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-05-06 00:12:25,510 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand has 14 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:25,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:12:25,585 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2021-05-06 00:12:25,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 00:12:25,585 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-05-06 00:12:25,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:12:25,586 INFO L225 Difference]: With dead ends: 25 [2021-05-06 00:12:25,586 INFO L226 Difference]: Without dead ends: 22 [2021-05-06 00:12:25,586 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 109.1ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-05-06 00:12:25,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-05-06 00:12:25,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-05-06 00:12:25,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 18 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:25,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2021-05-06 00:12:25,588 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2021-05-06 00:12:25,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:12:25,588 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2021-05-06 00:12:25,588 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:25,589 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2021-05-06 00:12:25,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-06 00:12:25,589 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:12:25,589 INFO L523 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:12:25,808 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-06 00:12:25,809 INFO L428 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:12:25,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:12:25,809 INFO L82 PathProgramCache]: Analyzing trace with hash 854785521, now seen corresponding path program 10 times [2021-05-06 00:12:25,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:12:25,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678439523] [2021-05-06 00:12:25,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:12:25,816 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:12:25,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1336981301] [2021-05-06 00:12:25,816 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:12:25,861 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 00:12:25,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:12:25,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 48 conjunts are in the unsatisfiable core [2021-05-06 00:12:25,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:12:25,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:25,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:25,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:25,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:26,013 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:12:26,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:12:26,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678439523] [2021-05-06 00:12:26,014 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:12:26,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336981301] [2021-05-06 00:12:26,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336981301] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:12:26,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:12:26,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 00:12:26,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269014946] [2021-05-06 00:12:26,014 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 00:12:26,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:12:26,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 00:12:26,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2021-05-06 00:12:26,015 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand has 14 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:26,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:12:26,095 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2021-05-06 00:12:26,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 00:12:26,096 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-05-06 00:12:26,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:12:26,096 INFO L225 Difference]: With dead ends: 26 [2021-05-06 00:12:26,096 INFO L226 Difference]: Without dead ends: 23 [2021-05-06 00:12:26,096 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 105.2ms TimeCoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-05-06 00:12:26,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-05-06 00:12:26,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-05-06 00:12:26,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 19 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:26,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2021-05-06 00:12:26,099 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2021-05-06 00:12:26,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:12:26,099 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2021-05-06 00:12:26,099 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:26,099 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2021-05-06 00:12:26,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 00:12:26,099 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:12:26,099 INFO L523 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:12:26,308 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-06 00:12:26,309 INFO L428 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:12:26,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:12:26,309 INFO L82 PathProgramCache]: Analyzing trace with hash 728484907, now seen corresponding path program 11 times [2021-05-06 00:12:26,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:12:26,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063797866] [2021-05-06 00:12:26,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:12:26,316 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:12:26,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1736397551] [2021-05-06 00:12:26,316 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:12:26,369 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-06 00:12:26,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:12:26,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 52 conjunts are in the unsatisfiable core [2021-05-06 00:12:26,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:12:26,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:26,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:26,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:26,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:26,529 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:12:26,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:12:26,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063797866] [2021-05-06 00:12:26,530 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:12:26,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736397551] [2021-05-06 00:12:26,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736397551] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:12:26,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:12:26,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-06 00:12:26,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873333204] [2021-05-06 00:12:26,530 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 00:12:26,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:12:26,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 00:12:26,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2021-05-06 00:12:26,531 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand has 15 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:26,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:12:26,619 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2021-05-06 00:12:26,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 00:12:26,620 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2021-05-06 00:12:26,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:12:26,620 INFO L225 Difference]: With dead ends: 27 [2021-05-06 00:12:26,620 INFO L226 Difference]: Without dead ends: 24 [2021-05-06 00:12:26,620 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 106.9ms TimeCoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-05-06 00:12:26,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-05-06 00:12:26,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-05-06 00:12:26,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 20 states have (on average 1.05) internal successors, (21), 20 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:26,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2021-05-06 00:12:26,623 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2021-05-06 00:12:26,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:12:26,623 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2021-05-06 00:12:26,623 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:26,623 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2021-05-06 00:12:26,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 00:12:26,623 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:12:26,623 INFO L523 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:12:26,836 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:12:26,837 INFO L428 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:12:26,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:12:26,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1108133169, now seen corresponding path program 12 times [2021-05-06 00:12:26,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:12:26,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147963008] [2021-05-06 00:12:26,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:12:26,843 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:12:26,843 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [6765307] [2021-05-06 00:12:26,843 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:12:26,883 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-06 00:12:26,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:12:26,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 56 conjunts are in the unsatisfiable core [2021-05-06 00:12:26,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:12:27,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:27,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:27,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:27,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:27,069 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:12:27,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:12:27,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147963008] [2021-05-06 00:12:27,070 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:12:27,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6765307] [2021-05-06 00:12:27,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6765307] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:12:27,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:12:27,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-06 00:12:27,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329110840] [2021-05-06 00:12:27,070 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-06 00:12:27,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:12:27,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-06 00:12:27,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2021-05-06 00:12:27,071 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand has 16 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:27,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:12:27,183 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2021-05-06 00:12:27,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 00:12:27,183 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2021-05-06 00:12:27,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:12:27,183 INFO L225 Difference]: With dead ends: 28 [2021-05-06 00:12:27,183 INFO L226 Difference]: Without dead ends: 25 [2021-05-06 00:12:27,184 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 125.4ms TimeCoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2021-05-06 00:12:27,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-06 00:12:27,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-05-06 00:12:27,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 21 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:27,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2021-05-06 00:12:27,186 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2021-05-06 00:12:27,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:12:27,186 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2021-05-06 00:12:27,186 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:27,186 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2021-05-06 00:12:27,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-06 00:12:27,187 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:12:27,187 INFO L523 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:12:27,397 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-05-06 00:12:27,397 INFO L428 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:12:27,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:12:27,397 INFO L82 PathProgramCache]: Analyzing trace with hash -7672597, now seen corresponding path program 13 times [2021-05-06 00:12:27,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:12:27,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934340609] [2021-05-06 00:12:27,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:12:27,403 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:12:27,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1983193575] [2021-05-06 00:12:27,404 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:12:27,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 00:12:27,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 60 conjunts are in the unsatisfiable core [2021-05-06 00:12:27,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:12:27,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:27,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:27,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:27,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:27,681 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:12:27,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:12:27,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934340609] [2021-05-06 00:12:27,681 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:12:27,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983193575] [2021-05-06 00:12:27,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983193575] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:12:27,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:12:27,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-06 00:12:27,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244273156] [2021-05-06 00:12:27,682 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-06 00:12:27,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:12:27,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-06 00:12:27,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2021-05-06 00:12:27,682 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand has 17 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:27,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:12:27,800 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2021-05-06 00:12:27,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-06 00:12:27,800 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2021-05-06 00:12:27,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:12:27,801 INFO L225 Difference]: With dead ends: 29 [2021-05-06 00:12:27,801 INFO L226 Difference]: Without dead ends: 26 [2021-05-06 00:12:27,802 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 174.3ms TimeCoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2021-05-06 00:12:27,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-06 00:12:27,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-05-06 00:12:27,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 22 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:27,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2021-05-06 00:12:27,815 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2021-05-06 00:12:27,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:12:27,815 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2021-05-06 00:12:27,815 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:27,815 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2021-05-06 00:12:27,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-06 00:12:27,815 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:12:27,815 INFO L523 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:12:28,016 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:12:28,016 INFO L428 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:12:28,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:12:28,016 INFO L82 PathProgramCache]: Analyzing trace with hash -237912975, now seen corresponding path program 14 times [2021-05-06 00:12:28,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:12:28,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53310133] [2021-05-06 00:12:28,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:12:28,022 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:12:28,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [132874429] [2021-05-06 00:12:28,022 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:12:28,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 00:12:28,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:12:28,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 64 conjunts are in the unsatisfiable core [2021-05-06 00:12:28,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:12:28,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:28,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:28,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:28,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:28,319 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:12:28,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:12:28,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53310133] [2021-05-06 00:12:28,319 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:12:28,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132874429] [2021-05-06 00:12:28,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132874429] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:12:28,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:12:28,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-06 00:12:28,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478196448] [2021-05-06 00:12:28,319 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-06 00:12:28,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:12:28,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-06 00:12:28,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2021-05-06 00:12:28,320 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand has 18 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:28,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:12:28,460 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2021-05-06 00:12:28,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-06 00:12:28,460 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-05-06 00:12:28,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:12:28,461 INFO L225 Difference]: With dead ends: 30 [2021-05-06 00:12:28,461 INFO L226 Difference]: Without dead ends: 27 [2021-05-06 00:12:28,461 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 150.4ms TimeCoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2021-05-06 00:12:28,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-06 00:12:28,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-06 00:12:28,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:28,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2021-05-06 00:12:28,463 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2021-05-06 00:12:28,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:12:28,463 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2021-05-06 00:12:28,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:28,463 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2021-05-06 00:12:28,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-06 00:12:28,464 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:12:28,464 INFO L523 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:12:28,673 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:12:28,673 INFO L428 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:12:28,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:12:28,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1214569899, now seen corresponding path program 15 times [2021-05-06 00:12:28,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:12:28,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820420033] [2021-05-06 00:12:28,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:12:28,680 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:12:28,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1229279036] [2021-05-06 00:12:28,680 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:12:28,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-05-06 00:12:28,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:12:28,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 68 conjunts are in the unsatisfiable core [2021-05-06 00:12:28,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:12:28,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:28,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:28,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:28,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:28,954 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:12:28,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:12:28,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820420033] [2021-05-06 00:12:28,954 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:12:28,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229279036] [2021-05-06 00:12:28,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229279036] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:12:28,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:12:28,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-05-06 00:12:28,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436710967] [2021-05-06 00:12:28,955 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-06 00:12:28,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:12:28,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-06 00:12:28,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2021-05-06 00:12:28,955 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand has 19 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:29,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:12:29,106 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2021-05-06 00:12:29,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-06 00:12:29,107 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2021-05-06 00:12:29,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:12:29,107 INFO L225 Difference]: With dead ends: 31 [2021-05-06 00:12:29,107 INFO L226 Difference]: Without dead ends: 28 [2021-05-06 00:12:29,107 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 175.6ms TimeCoverageRelationStatistics Valid=39, Invalid=341, Unknown=0, NotChecked=0, Total=380 [2021-05-06 00:12:29,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-05-06 00:12:29,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-05-06 00:12:29,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 24 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:29,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2021-05-06 00:12:29,109 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2021-05-06 00:12:29,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:12:29,109 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2021-05-06 00:12:29,110 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:29,110 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2021-05-06 00:12:29,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-06 00:12:29,110 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:12:29,110 INFO L523 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:12:29,326 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:12:29,326 INFO L428 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:12:29,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:12:29,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1003101263, now seen corresponding path program 16 times [2021-05-06 00:12:29,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:12:29,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060085790] [2021-05-06 00:12:29,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:12:29,332 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:12:29,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1504727894] [2021-05-06 00:12:29,332 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:12:29,382 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 00:12:29,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:12:29,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 72 conjunts are in the unsatisfiable core [2021-05-06 00:12:29,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:12:29,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:29,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:29,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:29,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:29,647 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:12:29,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:12:29,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060085790] [2021-05-06 00:12:29,648 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:12:29,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504727894] [2021-05-06 00:12:29,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504727894] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:12:29,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:12:29,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-05-06 00:12:29,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882073034] [2021-05-06 00:12:29,648 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-06 00:12:29,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:12:29,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-06 00:12:29,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2021-05-06 00:12:29,649 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand has 20 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:29,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:12:29,830 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2021-05-06 00:12:29,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-06 00:12:29,830 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2021-05-06 00:12:29,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:12:29,831 INFO L225 Difference]: With dead ends: 32 [2021-05-06 00:12:29,831 INFO L226 Difference]: Without dead ends: 29 [2021-05-06 00:12:29,831 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 200.0ms TimeCoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2021-05-06 00:12:29,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-06 00:12:29,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-05-06 00:12:29,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 25 states have (on average 1.04) internal successors, (26), 25 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:29,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2021-05-06 00:12:29,833 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2021-05-06 00:12:29,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:12:29,833 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2021-05-06 00:12:29,833 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:29,833 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2021-05-06 00:12:29,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 00:12:29,834 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:12:29,834 INFO L523 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:12:30,037 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-05-06 00:12:30,037 INFO L428 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:12:30,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:12:30,037 INFO L82 PathProgramCache]: Analyzing trace with hash -1031430549, now seen corresponding path program 17 times [2021-05-06 00:12:30,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:12:30,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623468145] [2021-05-06 00:12:30,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:12:30,042 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:12:30,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [434397479] [2021-05-06 00:12:30,043 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:12:30,092 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-05-06 00:12:30,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:12:30,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 76 conjunts are in the unsatisfiable core [2021-05-06 00:12:30,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:12:30,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:30,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:30,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:30,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:30,358 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:12:30,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:12:30,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623468145] [2021-05-06 00:12:30,358 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:12:30,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434397479] [2021-05-06 00:12:30,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434397479] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:12:30,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:12:30,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-05-06 00:12:30,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315655721] [2021-05-06 00:12:30,362 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-06 00:12:30,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:12:30,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-06 00:12:30,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2021-05-06 00:12:30,362 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand has 21 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:30,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:12:30,537 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2021-05-06 00:12:30,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-06 00:12:30,538 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2021-05-06 00:12:30,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:12:30,538 INFO L225 Difference]: With dead ends: 33 [2021-05-06 00:12:30,538 INFO L226 Difference]: Without dead ends: 30 [2021-05-06 00:12:30,539 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 207.8ms TimeCoverageRelationStatistics Valid=43, Invalid=419, Unknown=0, NotChecked=0, Total=462 [2021-05-06 00:12:30,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-05-06 00:12:30,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-05-06 00:12:30,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:30,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2021-05-06 00:12:30,541 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2021-05-06 00:12:30,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:12:30,541 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2021-05-06 00:12:30,541 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:30,541 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2021-05-06 00:12:30,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-06 00:12:30,541 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:12:30,541 INFO L523 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:12:30,758 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-05-06 00:12:30,758 INFO L428 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:12:30,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:12:30,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1909638415, now seen corresponding path program 18 times [2021-05-06 00:12:30,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:12:30,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045779661] [2021-05-06 00:12:30,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:12:30,788 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:12:30,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1901309508] [2021-05-06 00:12:30,788 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:12:30,849 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-05-06 00:12:30,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:12:30,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 80 conjunts are in the unsatisfiable core [2021-05-06 00:12:30,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:12:31,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:31,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:31,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:31,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:31,138 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:12:31,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:12:31,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045779661] [2021-05-06 00:12:31,139 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:12:31,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901309508] [2021-05-06 00:12:31,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901309508] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:12:31,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:12:31,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-05-06 00:12:31,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620851386] [2021-05-06 00:12:31,139 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-06 00:12:31,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:12:31,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-06 00:12:31,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2021-05-06 00:12:31,140 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand has 22 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:31,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:12:31,337 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2021-05-06 00:12:31,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-06 00:12:31,337 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2021-05-06 00:12:31,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:12:31,337 INFO L225 Difference]: With dead ends: 34 [2021-05-06 00:12:31,338 INFO L226 Difference]: Without dead ends: 31 [2021-05-06 00:12:31,338 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 229.0ms TimeCoverageRelationStatistics Valid=45, Invalid=461, Unknown=0, NotChecked=0, Total=506 [2021-05-06 00:12:31,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-06 00:12:31,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-05-06 00:12:31,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 27 states have (on average 1.037037037037037) internal successors, (28), 27 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:31,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2021-05-06 00:12:31,340 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2021-05-06 00:12:31,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:12:31,340 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2021-05-06 00:12:31,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:31,340 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2021-05-06 00:12:31,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-06 00:12:31,340 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:12:31,340 INFO L523 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:12:31,556 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:12:31,556 INFO L428 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:12:31,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:12:31,557 INFO L82 PathProgramCache]: Analyzing trace with hash 930688811, now seen corresponding path program 19 times [2021-05-06 00:12:31,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:12:31,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758868144] [2021-05-06 00:12:31,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:12:31,562 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:12:31,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [732504957] [2021-05-06 00:12:31,562 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:12:31,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 00:12:31,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 84 conjunts are in the unsatisfiable core [2021-05-06 00:12:31,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:12:31,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:31,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:31,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:31,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:31,900 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:12:31,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:12:31,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758868144] [2021-05-06 00:12:31,901 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:12:31,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732504957] [2021-05-06 00:12:31,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732504957] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:12:31,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:12:31,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-05-06 00:12:31,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019992536] [2021-05-06 00:12:31,901 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-06 00:12:31,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:12:31,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-06 00:12:31,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2021-05-06 00:12:31,902 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand has 23 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:32,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:12:32,118 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2021-05-06 00:12:32,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-06 00:12:32,119 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2021-05-06 00:12:32,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:12:32,119 INFO L225 Difference]: With dead ends: 35 [2021-05-06 00:12:32,119 INFO L226 Difference]: Without dead ends: 32 [2021-05-06 00:12:32,119 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 237.6ms TimeCoverageRelationStatistics Valid=47, Invalid=505, Unknown=0, NotChecked=0, Total=552 [2021-05-06 00:12:32,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-06 00:12:32,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-06 00:12:32,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 28 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:32,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2021-05-06 00:12:32,121 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2021-05-06 00:12:32,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:12:32,122 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2021-05-06 00:12:32,122 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:32,122 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2021-05-06 00:12:32,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-06 00:12:32,122 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:12:32,122 INFO L523 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:12:32,338 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-05-06 00:12:32,338 INFO L428 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:12:32,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:12:32,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1213480399, now seen corresponding path program 20 times [2021-05-06 00:12:32,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:12:32,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858077087] [2021-05-06 00:12:32,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:12:32,344 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:12:32,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [644772868] [2021-05-06 00:12:32,344 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:12:32,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 00:12:32,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:12:32,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 88 conjunts are in the unsatisfiable core [2021-05-06 00:12:32,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:12:32,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:32,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:32,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:32,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:32,710 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:12:32,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:12:32,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858077087] [2021-05-06 00:12:32,710 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:12:32,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644772868] [2021-05-06 00:12:32,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644772868] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:12:32,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:12:32,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2021-05-06 00:12:32,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847292116] [2021-05-06 00:12:32,710 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-06 00:12:32,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:12:32,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-06 00:12:32,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2021-05-06 00:12:32,711 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand has 24 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:32,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:12:32,929 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2021-05-06 00:12:32,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-06 00:12:32,930 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2021-05-06 00:12:32,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:12:32,930 INFO L225 Difference]: With dead ends: 36 [2021-05-06 00:12:32,930 INFO L226 Difference]: Without dead ends: 33 [2021-05-06 00:12:32,930 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 257.1ms TimeCoverageRelationStatistics Valid=49, Invalid=551, Unknown=0, NotChecked=0, Total=600 [2021-05-06 00:12:32,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-06 00:12:32,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-06 00:12:32,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 29 states have (on average 1.0344827586206897) internal successors, (30), 29 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:32,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2021-05-06 00:12:32,932 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2021-05-06 00:12:32,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:12:32,932 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2021-05-06 00:12:32,933 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:32,933 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2021-05-06 00:12:32,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-06 00:12:32,933 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:12:32,933 INFO L523 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:12:33,149 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-05-06 00:12:33,149 INFO L428 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:12:33,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:12:33,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1036750827, now seen corresponding path program 21 times [2021-05-06 00:12:33,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:12:33,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694673028] [2021-05-06 00:12:33,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:12:33,162 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:12:33,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [126189572] [2021-05-06 00:12:33,162 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:12:33,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-05-06 00:12:33,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:12:33,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 93 conjunts are in the unsatisfiable core [2021-05-06 00:12:33,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:12:33,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:33,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:33,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:33,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:33,649 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:12:33,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:12:33,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694673028] [2021-05-06 00:12:33,649 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:12:33,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126189572] [2021-05-06 00:12:33,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126189572] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:12:33,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:12:33,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2021-05-06 00:12:33,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721368797] [2021-05-06 00:12:33,650 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-06 00:12:33,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:12:33,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-06 00:12:33,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2021-05-06 00:12:33,650 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand has 26 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:33,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:12:33,939 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2021-05-06 00:12:33,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-06 00:12:33,939 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2021-05-06 00:12:33,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:12:33,940 INFO L225 Difference]: With dead ends: 37 [2021-05-06 00:12:33,940 INFO L226 Difference]: Without dead ends: 34 [2021-05-06 00:12:33,940 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 359.1ms TimeCoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2021-05-06 00:12:33,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-06 00:12:33,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-05-06 00:12:33,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 30 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:33,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2021-05-06 00:12:33,943 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2021-05-06 00:12:33,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:12:33,943 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2021-05-06 00:12:33,943 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:33,943 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2021-05-06 00:12:33,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 00:12:33,943 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:12:33,943 INFO L523 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:12:34,153 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:12:34,153 INFO L428 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:12:34,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:12:34,154 INFO L82 PathProgramCache]: Analyzing trace with hash 2074442097, now seen corresponding path program 22 times [2021-05-06 00:12:34,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:12:34,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148259901] [2021-05-06 00:12:34,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:12:34,159 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:12:34,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1978266572] [2021-05-06 00:12:34,159 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:12:34,220 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 00:12:34,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:12:34,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 96 conjunts are in the unsatisfiable core [2021-05-06 00:12:34,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:12:34,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:34,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:34,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:34,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:34,579 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:12:34,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:12:34,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148259901] [2021-05-06 00:12:34,579 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:12:34,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978266572] [2021-05-06 00:12:34,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978266572] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:12:34,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:12:34,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2021-05-06 00:12:34,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323071478] [2021-05-06 00:12:34,580 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-06 00:12:34,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:12:34,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-06 00:12:34,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2021-05-06 00:12:34,580 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand has 26 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:34,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:12:34,879 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2021-05-06 00:12:34,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-06 00:12:34,879 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2021-05-06 00:12:34,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:12:34,880 INFO L225 Difference]: With dead ends: 38 [2021-05-06 00:12:34,880 INFO L226 Difference]: Without dead ends: 35 [2021-05-06 00:12:34,880 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 300.7ms TimeCoverageRelationStatistics Valid=53, Invalid=649, Unknown=0, NotChecked=0, Total=702 [2021-05-06 00:12:34,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-06 00:12:34,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-06 00:12:34,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:34,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2021-05-06 00:12:34,882 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2021-05-06 00:12:34,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:12:34,882 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2021-05-06 00:12:34,882 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:34,882 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2021-05-06 00:12:34,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-06 00:12:34,883 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:12:34,883 INFO L523 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:12:35,083 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-05-06 00:12:35,083 INFO L428 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:12:35,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:12:35,084 INFO L82 PathProgramCache]: Analyzing trace with hash -116866901, now seen corresponding path program 23 times [2021-05-06 00:12:35,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:12:35,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255275714] [2021-05-06 00:12:35,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:12:35,089 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:12:35,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [999906796] [2021-05-06 00:12:35,089 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:12:35,142 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-05-06 00:12:35,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:12:35,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 100 conjunts are in the unsatisfiable core [2021-05-06 00:12:35,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:12:35,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:35,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:35,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:35,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:35,538 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:12:35,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:12:35,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255275714] [2021-05-06 00:12:35,539 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:12:35,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999906796] [2021-05-06 00:12:35,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999906796] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:12:35,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:12:35,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2021-05-06 00:12:35,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837019317] [2021-05-06 00:12:35,539 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-06 00:12:35,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:12:35,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-06 00:12:35,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2021-05-06 00:12:35,540 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand has 27 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:35,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:12:35,824 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2021-05-06 00:12:35,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-06 00:12:35,824 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2021-05-06 00:12:35,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:12:35,824 INFO L225 Difference]: With dead ends: 39 [2021-05-06 00:12:35,825 INFO L226 Difference]: Without dead ends: 36 [2021-05-06 00:12:35,825 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 324.3ms TimeCoverageRelationStatistics Valid=55, Invalid=701, Unknown=0, NotChecked=0, Total=756 [2021-05-06 00:12:35,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-06 00:12:35,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-05-06 00:12:35,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 32 states have (on average 1.03125) internal successors, (33), 32 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:35,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2021-05-06 00:12:35,827 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2021-05-06 00:12:35,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:12:35,827 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2021-05-06 00:12:35,827 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:35,827 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2021-05-06 00:12:35,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-06 00:12:35,827 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:12:35,827 INFO L523 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:12:36,044 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:12:36,044 INFO L428 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:12:36,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:12:36,044 INFO L82 PathProgramCache]: Analyzing trace with hash 672030897, now seen corresponding path program 24 times [2021-05-06 00:12:36,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:12:36,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049200258] [2021-05-06 00:12:36,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:12:36,050 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:12:36,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2021130219] [2021-05-06 00:12:36,050 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:12:36,120 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-05-06 00:12:36,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:12:36,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 104 conjunts are in the unsatisfiable core [2021-05-06 00:12:36,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:12:36,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:36,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:36,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:36,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:36,549 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:12:36,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:12:36,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049200258] [2021-05-06 00:12:36,549 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:12:36,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021130219] [2021-05-06 00:12:36,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021130219] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:12:36,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:12:36,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2021-05-06 00:12:36,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565185780] [2021-05-06 00:12:36,550 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-06 00:12:36,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:12:36,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-06 00:12:36,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2021-05-06 00:12:36,550 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand has 28 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 28 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:36,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:12:36,898 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2021-05-06 00:12:36,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-06 00:12:36,899 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 28 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2021-05-06 00:12:36,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:12:36,899 INFO L225 Difference]: With dead ends: 40 [2021-05-06 00:12:36,899 INFO L226 Difference]: Without dead ends: 37 [2021-05-06 00:12:36,899 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 357.3ms TimeCoverageRelationStatistics Valid=57, Invalid=755, Unknown=0, NotChecked=0, Total=812 [2021-05-06 00:12:36,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-05-06 00:12:36,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-05-06 00:12:36,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 33 states have (on average 1.0303030303030303) internal successors, (34), 33 states have internal predecessors, (34), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:36,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2021-05-06 00:12:36,902 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2021-05-06 00:12:36,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:12:36,902 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2021-05-06 00:12:36,902 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 28 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:36,902 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2021-05-06 00:12:36,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-06 00:12:36,902 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:12:36,902 INFO L523 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:12:37,116 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2021-05-06 00:12:37,117 INFO L428 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:12:37,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:12:37,117 INFO L82 PathProgramCache]: Analyzing trace with hash -641941141, now seen corresponding path program 25 times [2021-05-06 00:12:37,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:12:37,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036045856] [2021-05-06 00:12:37,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:12:37,123 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:12:37,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1952520913] [2021-05-06 00:12:37,123 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:12:37,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 00:12:37,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 108 conjunts are in the unsatisfiable core [2021-05-06 00:12:37,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:12:37,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:37,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:37,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:37,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:37,644 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:12:37,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:12:37,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036045856] [2021-05-06 00:12:37,644 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:12:37,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952520913] [2021-05-06 00:12:37,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952520913] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:12:37,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:12:37,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2021-05-06 00:12:37,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689146145] [2021-05-06 00:12:37,645 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-06 00:12:37,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:12:37,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-06 00:12:37,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2021-05-06 00:12:37,645 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand has 29 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 29 states have internal predecessors, (33), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:37,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:12:37,970 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2021-05-06 00:12:37,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-06 00:12:37,970 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 29 states have internal predecessors, (33), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2021-05-06 00:12:37,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:12:37,970 INFO L225 Difference]: With dead ends: 41 [2021-05-06 00:12:37,971 INFO L226 Difference]: Without dead ends: 38 [2021-05-06 00:12:37,971 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 381.5ms TimeCoverageRelationStatistics Valid=59, Invalid=811, Unknown=0, NotChecked=0, Total=870 [2021-05-06 00:12:37,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-06 00:12:37,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-05-06 00:12:37,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 34 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:37,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2021-05-06 00:12:37,973 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2021-05-06 00:12:37,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:12:37,973 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2021-05-06 00:12:37,973 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 29 states have internal predecessors, (33), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:37,973 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2021-05-06 00:12:37,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-06 00:12:37,973 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:12:37,974 INFO L523 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:12:38,178 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:12:38,178 INFO L428 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:12:38,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:12:38,179 INFO L82 PathProgramCache]: Analyzing trace with hash 1574598641, now seen corresponding path program 26 times [2021-05-06 00:12:38,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:12:38,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724529863] [2021-05-06 00:12:38,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:12:38,184 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:12:38,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1667583965] [2021-05-06 00:12:38,184 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:12:38,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 00:12:38,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:12:38,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 112 conjunts are in the unsatisfiable core [2021-05-06 00:12:38,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:12:38,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:38,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:38,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:38,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:38,711 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:12:38,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:12:38,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724529863] [2021-05-06 00:12:38,711 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:12:38,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667583965] [2021-05-06 00:12:38,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667583965] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:12:38,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:12:38,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2021-05-06 00:12:38,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964125699] [2021-05-06 00:12:38,712 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-06 00:12:38,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:12:38,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-06 00:12:38,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2021-05-06 00:12:38,712 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand has 30 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 30 states have internal predecessors, (34), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:39,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:12:39,060 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2021-05-06 00:12:39,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-06 00:12:39,061 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 30 states have internal predecessors, (34), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2021-05-06 00:12:39,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:12:39,061 INFO L225 Difference]: With dead ends: 42 [2021-05-06 00:12:39,061 INFO L226 Difference]: Without dead ends: 39 [2021-05-06 00:12:39,061 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 387.4ms TimeCoverageRelationStatistics Valid=61, Invalid=869, Unknown=0, NotChecked=0, Total=930 [2021-05-06 00:12:39,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-06 00:12:39,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-05-06 00:12:39,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 35 states have (on average 1.0285714285714285) internal successors, (36), 35 states have internal predecessors, (36), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:39,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2021-05-06 00:12:39,063 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2021-05-06 00:12:39,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:12:39,064 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2021-05-06 00:12:39,064 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 30 states have internal predecessors, (34), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:39,064 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2021-05-06 00:12:39,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-06 00:12:39,064 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:12:39,064 INFO L523 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:12:39,276 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-05-06 00:12:39,277 INFO L428 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:12:39,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:12:39,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1567855147, now seen corresponding path program 27 times [2021-05-06 00:12:39,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:12:39,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768566875] [2021-05-06 00:12:39,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:12:39,283 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:12:39,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [461917950] [2021-05-06 00:12:39,283 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:12:39,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-05-06 00:12:39,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:12:39,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 117 conjunts are in the unsatisfiable core [2021-05-06 00:12:39,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:12:39,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:39,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:39,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:39,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:39,907 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:12:39,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:12:39,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768566875] [2021-05-06 00:12:39,907 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:12:39,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461917950] [2021-05-06 00:12:39,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461917950] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:12:39,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:12:39,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2021-05-06 00:12:39,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120980704] [2021-05-06 00:12:39,908 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-06 00:12:39,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:12:39,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-06 00:12:39,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=903, Unknown=0, NotChecked=0, Total=992 [2021-05-06 00:12:39,908 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand has 32 states, 32 states have (on average 1.09375) internal successors, (35), 32 states have internal predecessors, (35), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:40,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:12:40,328 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2021-05-06 00:12:40,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-06 00:12:40,329 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.09375) internal successors, (35), 32 states have internal predecessors, (35), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2021-05-06 00:12:40,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:12:40,330 INFO L225 Difference]: With dead ends: 43 [2021-05-06 00:12:40,330 INFO L226 Difference]: Without dead ends: 40 [2021-05-06 00:12:40,330 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 484.7ms TimeCoverageRelationStatistics Valid=94, Invalid=962, Unknown=0, NotChecked=0, Total=1056 [2021-05-06 00:12:40,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-06 00:12:40,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-05-06 00:12:40,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 36 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:40,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2021-05-06 00:12:40,332 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2021-05-06 00:12:40,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:12:40,332 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2021-05-06 00:12:40,332 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.09375) internal successors, (35), 32 states have internal predecessors, (35), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:40,332 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2021-05-06 00:12:40,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-06 00:12:40,332 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:12:40,333 INFO L523 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:12:40,541 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-05-06 00:12:40,541 INFO L428 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:12:40,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:12:40,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1358806833, now seen corresponding path program 28 times [2021-05-06 00:12:40,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:12:40,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239208389] [2021-05-06 00:12:40,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:12:40,547 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:12:40,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1300580767] [2021-05-06 00:12:40,547 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:12:40,600 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 00:12:40,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:12:40,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 120 conjunts are in the unsatisfiable core [2021-05-06 00:12:40,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:12:41,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:41,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:41,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:41,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:41,108 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:12:41,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:12:41,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239208389] [2021-05-06 00:12:41,108 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:12:41,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300580767] [2021-05-06 00:12:41,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300580767] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:12:41,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:12:41,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2021-05-06 00:12:41,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520021321] [2021-05-06 00:12:41,108 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-06 00:12:41,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:12:41,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-06 00:12:41,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2021-05-06 00:12:41,109 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand has 32 states, 32 states have (on average 1.125) internal successors, (36), 32 states have internal predecessors, (36), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:41,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:12:41,498 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2021-05-06 00:12:41,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-06 00:12:41,498 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.125) internal successors, (36), 32 states have internal predecessors, (36), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2021-05-06 00:12:41,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:12:41,498 INFO L225 Difference]: With dead ends: 44 [2021-05-06 00:12:41,498 INFO L226 Difference]: Without dead ends: 41 [2021-05-06 00:12:41,499 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 431.6ms TimeCoverageRelationStatistics Valid=65, Invalid=991, Unknown=0, NotChecked=0, Total=1056 [2021-05-06 00:12:41,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-06 00:12:41,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-05-06 00:12:41,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 37 states have (on average 1.027027027027027) internal successors, (38), 37 states have internal predecessors, (38), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:41,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2021-05-06 00:12:41,501 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2021-05-06 00:12:41,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:12:41,501 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2021-05-06 00:12:41,501 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.125) internal successors, (36), 32 states have internal predecessors, (36), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:41,501 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2021-05-06 00:12:41,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-06 00:12:41,501 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:12:41,501 INFO L523 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:12:41,702 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:12:41,702 INFO L428 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:12:41,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:12:41,702 INFO L82 PathProgramCache]: Analyzing trace with hash -826723605, now seen corresponding path program 29 times [2021-05-06 00:12:41,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:12:41,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096163536] [2021-05-06 00:12:41,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:12:41,707 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:12:41,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [916122159] [2021-05-06 00:12:41,707 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:12:41,770 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-05-06 00:12:41,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:12:41,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 124 conjunts are in the unsatisfiable core [2021-05-06 00:12:41,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:12:42,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:42,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:42,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:42,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:42,330 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:12:42,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:12:42,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096163536] [2021-05-06 00:12:42,331 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:12:42,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916122159] [2021-05-06 00:12:42,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916122159] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:12:42,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:12:42,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2021-05-06 00:12:42,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740848985] [2021-05-06 00:12:42,331 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-06 00:12:42,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:12:42,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-06 00:12:42,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2021-05-06 00:12:42,332 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand has 33 states, 33 states have (on average 1.121212121212121) internal successors, (37), 33 states have internal predecessors, (37), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:42,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:12:42,744 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2021-05-06 00:12:42,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-06 00:12:42,745 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.121212121212121) internal successors, (37), 33 states have internal predecessors, (37), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2021-05-06 00:12:42,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:12:42,745 INFO L225 Difference]: With dead ends: 45 [2021-05-06 00:12:42,745 INFO L226 Difference]: Without dead ends: 42 [2021-05-06 00:12:42,745 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 488.0ms TimeCoverageRelationStatistics Valid=67, Invalid=1055, Unknown=0, NotChecked=0, Total=1122 [2021-05-06 00:12:42,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-06 00:12:42,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-05-06 00:12:42,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 38 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:42,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2021-05-06 00:12:42,748 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2021-05-06 00:12:42,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:12:42,748 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2021-05-06 00:12:42,748 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.121212121212121) internal successors, (37), 33 states have internal predecessors, (37), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:42,748 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2021-05-06 00:12:42,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-06 00:12:42,748 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:12:42,748 INFO L523 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:12:42,960 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:12:42,961 INFO L428 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:12:42,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:12:42,961 INFO L82 PathProgramCache]: Analyzing trace with hash 141309553, now seen corresponding path program 30 times [2021-05-06 00:12:42,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:12:42,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744788825] [2021-05-06 00:12:42,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:12:42,966 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:12:42,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [770689438] [2021-05-06 00:12:42,966 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:12:43,040 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-05-06 00:12:43,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:12:43,043 WARN L261 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 128 conjunts are in the unsatisfiable core [2021-05-06 00:12:43,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:12:43,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:43,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:43,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:43,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:43,577 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:12:43,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:12:43,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744788825] [2021-05-06 00:12:43,577 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:12:43,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770689438] [2021-05-06 00:12:43,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770689438] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:12:43,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:12:43,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2021-05-06 00:12:43,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811114973] [2021-05-06 00:12:43,577 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-06 00:12:43,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:12:43,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-06 00:12:43,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2021-05-06 00:12:43,578 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand has 34 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 34 states have internal predecessors, (38), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:44,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:12:44,014 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2021-05-06 00:12:44,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-06 00:12:44,014 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 34 states have internal predecessors, (38), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2021-05-06 00:12:44,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:12:44,015 INFO L225 Difference]: With dead ends: 46 [2021-05-06 00:12:44,015 INFO L226 Difference]: Without dead ends: 43 [2021-05-06 00:12:44,015 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 483.8ms TimeCoverageRelationStatistics Valid=69, Invalid=1121, Unknown=0, NotChecked=0, Total=1190 [2021-05-06 00:12:44,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-06 00:12:44,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-05-06 00:12:44,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 39 states have (on average 1.0256410256410255) internal successors, (40), 39 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:44,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2021-05-06 00:12:44,017 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2021-05-06 00:12:44,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:12:44,017 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2021-05-06 00:12:44,017 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 34 states have internal predecessors, (38), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:44,017 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2021-05-06 00:12:44,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-06 00:12:44,018 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:12:44,018 INFO L523 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:12:44,234 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-05-06 00:12:44,234 INFO L428 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:12:44,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:12:44,234 INFO L82 PathProgramCache]: Analyzing trace with hash 85566379, now seen corresponding path program 31 times [2021-05-06 00:12:44,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:12:44,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371158371] [2021-05-06 00:12:44,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:12:44,244 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:12:44,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [240428340] [2021-05-06 00:12:44,244 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:12:44,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 00:12:44,298 WARN L261 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 132 conjunts are in the unsatisfiable core [2021-05-06 00:12:44,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:12:44,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:44,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:44,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:44,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:44,855 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:12:44,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:12:44,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371158371] [2021-05-06 00:12:44,856 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:12:44,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240428340] [2021-05-06 00:12:44,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240428340] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:12:44,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:12:44,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2021-05-06 00:12:44,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619702289] [2021-05-06 00:12:44,856 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-06 00:12:44,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:12:44,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-06 00:12:44,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2021-05-06 00:12:44,857 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand has 35 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 35 states have internal predecessors, (39), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:45,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:12:45,359 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2021-05-06 00:12:45,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-06 00:12:45,360 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 35 states have internal predecessors, (39), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2021-05-06 00:12:45,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:12:45,360 INFO L225 Difference]: With dead ends: 47 [2021-05-06 00:12:45,360 INFO L226 Difference]: Without dead ends: 44 [2021-05-06 00:12:45,361 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 512.5ms TimeCoverageRelationStatistics Valid=71, Invalid=1189, Unknown=0, NotChecked=0, Total=1260 [2021-05-06 00:12:45,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-06 00:12:45,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-05-06 00:12:45,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 40 states have (on average 1.025) internal successors, (41), 40 states have internal predecessors, (41), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:45,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2021-05-06 00:12:45,363 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2021-05-06 00:12:45,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:12:45,363 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2021-05-06 00:12:45,363 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 35 states have internal predecessors, (39), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:45,363 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2021-05-06 00:12:45,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-06 00:12:45,363 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:12:45,363 INFO L523 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:12:45,579 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable91 [2021-05-06 00:12:45,580 INFO L428 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:12:45,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:12:45,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1642472015, now seen corresponding path program 32 times [2021-05-06 00:12:45,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:12:45,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403106353] [2021-05-06 00:12:45,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:12:45,585 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:12:45,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1718064329] [2021-05-06 00:12:45,585 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:12:45,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 00:12:45,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:12:45,645 WARN L261 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 136 conjunts are in the unsatisfiable core [2021-05-06 00:12:45,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:12:46,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:46,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:46,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:46,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:46,268 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:12:46,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:12:46,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403106353] [2021-05-06 00:12:46,268 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:12:46,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718064329] [2021-05-06 00:12:46,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718064329] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:12:46,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:12:46,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2021-05-06 00:12:46,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091275877] [2021-05-06 00:12:46,269 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-06 00:12:46,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:12:46,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-06 00:12:46,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2021-05-06 00:12:46,269 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand has 36 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 36 states have internal predecessors, (40), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:46,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:12:46,805 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2021-05-06 00:12:46,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-06 00:12:46,805 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 36 states have internal predecessors, (40), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2021-05-06 00:12:46,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:12:46,806 INFO L225 Difference]: With dead ends: 48 [2021-05-06 00:12:46,806 INFO L226 Difference]: Without dead ends: 45 [2021-05-06 00:12:46,806 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 562.4ms TimeCoverageRelationStatistics Valid=73, Invalid=1259, Unknown=0, NotChecked=0, Total=1332 [2021-05-06 00:12:46,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-06 00:12:46,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-05-06 00:12:46,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 41 states have (on average 1.024390243902439) internal successors, (42), 41 states have internal predecessors, (42), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:46,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2021-05-06 00:12:46,808 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2021-05-06 00:12:46,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:12:46,808 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2021-05-06 00:12:46,808 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 36 states have internal predecessors, (40), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:46,808 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2021-05-06 00:12:46,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-06 00:12:46,809 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:12:46,809 INFO L523 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:12:47,016 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:12:47,017 INFO L428 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:12:47,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:12:47,017 INFO L82 PathProgramCache]: Analyzing trace with hash 622912619, now seen corresponding path program 33 times [2021-05-06 00:12:47,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:12:47,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665970336] [2021-05-06 00:12:47,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:12:47,022 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:12:47,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [4086748] [2021-05-06 00:12:47,022 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:12:47,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-05-06 00:12:47,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:12:47,098 WARN L261 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 140 conjunts are in the unsatisfiable core [2021-05-06 00:12:47,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:12:47,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:47,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:47,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:47,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:47,772 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:12:47,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:12:47,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665970336] [2021-05-06 00:12:47,773 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:12:47,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4086748] [2021-05-06 00:12:47,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4086748] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:12:47,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:12:47,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2021-05-06 00:12:47,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367048736] [2021-05-06 00:12:47,773 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-06 00:12:47,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:12:47,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-06 00:12:47,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2021-05-06 00:12:47,774 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand has 37 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 37 states have internal predecessors, (41), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:48,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:12:48,337 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2021-05-06 00:12:48,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-06 00:12:48,337 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 37 states have internal predecessors, (41), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2021-05-06 00:12:48,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:12:48,338 INFO L225 Difference]: With dead ends: 49 [2021-05-06 00:12:48,338 INFO L226 Difference]: Without dead ends: 46 [2021-05-06 00:12:48,338 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 603.3ms TimeCoverageRelationStatistics Valid=75, Invalid=1331, Unknown=0, NotChecked=0, Total=1406 [2021-05-06 00:12:48,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-06 00:12:48,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-05-06 00:12:48,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 42 states have internal predecessors, (43), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:48,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2021-05-06 00:12:48,341 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2021-05-06 00:12:48,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:12:48,341 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2021-05-06 00:12:48,341 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 37 states have internal predecessors, (41), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:48,341 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2021-05-06 00:12:48,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-06 00:12:48,341 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:12:48,342 INFO L523 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:12:48,542 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-05-06 00:12:48,542 INFO L428 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:12:48,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:12:48,542 INFO L82 PathProgramCache]: Analyzing trace with hash 2130359537, now seen corresponding path program 34 times [2021-05-06 00:12:48,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:12:48,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570216428] [2021-05-06 00:12:48,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:12:48,548 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:12:48,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1154006768] [2021-05-06 00:12:48,548 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:12:48,617 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 00:12:48,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:12:48,619 WARN L261 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 144 conjunts are in the unsatisfiable core [2021-05-06 00:12:48,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:12:49,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:49,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:49,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:49,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:49,313 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:12:49,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:12:49,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570216428] [2021-05-06 00:12:49,313 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:12:49,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154006768] [2021-05-06 00:12:49,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154006768] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:12:49,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:12:49,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2021-05-06 00:12:49,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768582549] [2021-05-06 00:12:49,313 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-06 00:12:49,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:12:49,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-06 00:12:49,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2021-05-06 00:12:49,314 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand has 38 states, 38 states have (on average 1.105263157894737) internal successors, (42), 38 states have internal predecessors, (42), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:49,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:12:49,939 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2021-05-06 00:12:49,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-06 00:12:49,940 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.105263157894737) internal successors, (42), 38 states have internal predecessors, (42), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2021-05-06 00:12:49,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:12:49,940 INFO L225 Difference]: With dead ends: 50 [2021-05-06 00:12:49,940 INFO L226 Difference]: Without dead ends: 47 [2021-05-06 00:12:49,941 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 643.7ms TimeCoverageRelationStatistics Valid=77, Invalid=1405, Unknown=0, NotChecked=0, Total=1482 [2021-05-06 00:12:49,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-06 00:12:49,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-05-06 00:12:49,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 43 states have (on average 1.0232558139534884) internal successors, (44), 43 states have internal predecessors, (44), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:49,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2021-05-06 00:12:49,943 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2021-05-06 00:12:49,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:12:49,943 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2021-05-06 00:12:49,943 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.105263157894737) internal successors, (42), 38 states have internal predecessors, (42), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:49,943 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2021-05-06 00:12:49,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-06 00:12:49,943 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:12:49,943 INFO L523 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:12:50,156 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-05-06 00:12:50,159 INFO L428 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:12:50,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:12:50,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1616573739, now seen corresponding path program 35 times [2021-05-06 00:12:50,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:12:50,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596950034] [2021-05-06 00:12:50,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:12:50,166 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:12:50,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1238749671] [2021-05-06 00:12:50,167 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:12:50,228 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2021-05-06 00:12:50,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:12:50,230 WARN L261 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 148 conjunts are in the unsatisfiable core [2021-05-06 00:12:50,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:12:50,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:50,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:50,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:50,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:50,962 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:12:50,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:12:50,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596950034] [2021-05-06 00:12:50,962 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:12:50,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238749671] [2021-05-06 00:12:50,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238749671] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:12:50,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:12:50,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2021-05-06 00:12:50,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996750557] [2021-05-06 00:12:50,963 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-06 00:12:50,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:12:50,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-06 00:12:50,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2021-05-06 00:12:50,963 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand has 39 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 39 states have internal predecessors, (43), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:51,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:12:51,588 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2021-05-06 00:12:51,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-06 00:12:51,588 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 39 states have internal predecessors, (43), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2021-05-06 00:12:51,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:12:51,589 INFO L225 Difference]: With dead ends: 51 [2021-05-06 00:12:51,589 INFO L226 Difference]: Without dead ends: 48 [2021-05-06 00:12:51,589 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 669.1ms TimeCoverageRelationStatistics Valid=79, Invalid=1481, Unknown=0, NotChecked=0, Total=1560 [2021-05-06 00:12:51,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-06 00:12:51,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-05-06 00:12:51,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 44 states have (on average 1.0227272727272727) internal successors, (45), 44 states have internal predecessors, (45), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:51,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2021-05-06 00:12:51,591 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2021-05-06 00:12:51,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:12:51,591 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2021-05-06 00:12:51,591 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 39 states have internal predecessors, (43), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:51,591 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2021-05-06 00:12:51,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-06 00:12:51,592 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:12:51,592 INFO L523 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:12:51,804 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-05-06 00:12:51,805 INFO L428 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:12:51,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:12:51,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1425884111, now seen corresponding path program 36 times [2021-05-06 00:12:51,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:12:51,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63203102] [2021-05-06 00:12:51,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:12:51,810 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:12:51,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [36439579] [2021-05-06 00:12:51,811 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:12:51,887 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-05-06 00:12:51,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:12:51,889 WARN L261 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 152 conjunts are in the unsatisfiable core [2021-05-06 00:12:51,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:12:52,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:52,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:52,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:52,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:52,616 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:12:52,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:12:52,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63203102] [2021-05-06 00:12:52,616 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:12:52,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36439579] [2021-05-06 00:12:52,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36439579] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:12:52,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:12:52,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2021-05-06 00:12:52,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960326254] [2021-05-06 00:12:52,616 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-06 00:12:52,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:12:52,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-06 00:12:52,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2021-05-06 00:12:52,617 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand has 40 states, 40 states have (on average 1.1) internal successors, (44), 40 states have internal predecessors, (44), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:53,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:12:53,294 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2021-05-06 00:12:53,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-06 00:12:53,295 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.1) internal successors, (44), 40 states have internal predecessors, (44), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2021-05-06 00:12:53,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:12:53,295 INFO L225 Difference]: With dead ends: 52 [2021-05-06 00:12:53,295 INFO L226 Difference]: Without dead ends: 49 [2021-05-06 00:12:53,295 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 674.1ms TimeCoverageRelationStatistics Valid=81, Invalid=1559, Unknown=0, NotChecked=0, Total=1640 [2021-05-06 00:12:53,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-06 00:12:53,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-05-06 00:12:53,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 45 states have (on average 1.0222222222222221) internal successors, (46), 45 states have internal predecessors, (46), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:53,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2021-05-06 00:12:53,298 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2021-05-06 00:12:53,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:12:53,298 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2021-05-06 00:12:53,298 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.1) internal successors, (44), 40 states have internal predecessors, (44), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:53,298 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2021-05-06 00:12:53,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-06 00:12:53,298 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:12:53,298 INFO L523 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:12:53,506 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-05-06 00:12:53,507 INFO L428 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:12:53,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:12:53,507 INFO L82 PathProgramCache]: Analyzing trace with hash -1252796949, now seen corresponding path program 37 times [2021-05-06 00:12:53,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:12:53,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327340409] [2021-05-06 00:12:53,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:12:53,513 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:12:53,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [480783043] [2021-05-06 00:12:53,514 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:12:53,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 00:12:53,571 WARN L261 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 156 conjunts are in the unsatisfiable core [2021-05-06 00:12:53,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:12:54,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:54,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:54,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:54,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:54,323 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:12:54,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:12:54,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327340409] [2021-05-06 00:12:54,323 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:12:54,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480783043] [2021-05-06 00:12:54,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480783043] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:12:54,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:12:54,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2021-05-06 00:12:54,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539818338] [2021-05-06 00:12:54,324 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-05-06 00:12:54,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:12:54,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-05-06 00:12:54,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2021-05-06 00:12:54,324 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand has 41 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 41 states have internal predecessors, (45), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:55,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:12:55,041 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2021-05-06 00:12:55,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-06 00:12:55,042 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 41 states have internal predecessors, (45), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2021-05-06 00:12:55,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:12:55,042 INFO L225 Difference]: With dead ends: 53 [2021-05-06 00:12:55,042 INFO L226 Difference]: Without dead ends: 50 [2021-05-06 00:12:55,042 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 694.6ms TimeCoverageRelationStatistics Valid=83, Invalid=1639, Unknown=0, NotChecked=0, Total=1722 [2021-05-06 00:12:55,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-06 00:12:55,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-05-06 00:12:55,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 46 states have (on average 1.0217391304347827) internal successors, (47), 46 states have internal predecessors, (47), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:55,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2021-05-06 00:12:55,045 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2021-05-06 00:12:55,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:12:55,045 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2021-05-06 00:12:55,045 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 41 states have internal predecessors, (45), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:55,045 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2021-05-06 00:12:55,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-06 00:12:55,045 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:12:55,045 INFO L523 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:12:55,261 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:12:55,261 INFO L428 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:12:55,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:12:55,262 INFO L82 PathProgramCache]: Analyzing trace with hash -182062223, now seen corresponding path program 38 times [2021-05-06 00:12:55,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:12:55,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210834978] [2021-05-06 00:12:55,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:12:55,267 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:12:55,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1209684418] [2021-05-06 00:12:55,267 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:12:55,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 00:12:55,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:12:55,335 WARN L261 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 160 conjunts are in the unsatisfiable core [2021-05-06 00:12:55,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:12:56,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:56,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:56,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:56,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:56,235 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:12:56,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:12:56,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210834978] [2021-05-06 00:12:56,236 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:12:56,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209684418] [2021-05-06 00:12:56,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209684418] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:12:56,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:12:56,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2021-05-06 00:12:56,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836522905] [2021-05-06 00:12:56,236 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-05-06 00:12:56,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:12:56,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-05-06 00:12:56,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2021-05-06 00:12:56,237 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand has 42 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 42 states have internal predecessors, (46), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:57,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:12:57,088 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2021-05-06 00:12:57,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-06 00:12:57,088 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 42 states have internal predecessors, (46), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2021-05-06 00:12:57,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:12:57,089 INFO L225 Difference]: With dead ends: 54 [2021-05-06 00:12:57,089 INFO L226 Difference]: Without dead ends: 51 [2021-05-06 00:12:57,089 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 823.0ms TimeCoverageRelationStatistics Valid=85, Invalid=1721, Unknown=0, NotChecked=0, Total=1806 [2021-05-06 00:12:57,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-06 00:12:57,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-05-06 00:12:57,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 47 states have (on average 1.0212765957446808) internal successors, (48), 47 states have internal predecessors, (48), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:57,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2021-05-06 00:12:57,091 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2021-05-06 00:12:57,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:12:57,092 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2021-05-06 00:12:57,092 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 42 states have internal predecessors, (46), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:57,092 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2021-05-06 00:12:57,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-06 00:12:57,092 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:12:57,092 INFO L523 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:12:57,308 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-05-06 00:12:57,308 INFO L428 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:12:57,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:12:57,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1349024085, now seen corresponding path program 39 times [2021-05-06 00:12:57,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:12:57,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781033266] [2021-05-06 00:12:57,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:12:57,314 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:12:57,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [383596489] [2021-05-06 00:12:57,314 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:12:57,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2021-05-06 00:12:57,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:12:57,406 WARN L261 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 164 conjunts are in the unsatisfiable core [2021-05-06 00:12:57,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:12:58,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:58,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:58,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:58,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:58,307 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:12:58,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:12:58,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781033266] [2021-05-06 00:12:58,307 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:12:58,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383596489] [2021-05-06 00:12:58,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383596489] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:12:58,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:12:58,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2021-05-06 00:12:58,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139401596] [2021-05-06 00:12:58,308 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-05-06 00:12:58,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:12:58,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-05-06 00:12:58,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2021-05-06 00:12:58,308 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand has 43 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 43 states have internal predecessors, (47), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:59,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:12:59,117 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2021-05-06 00:12:59,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-06 00:12:59,118 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 43 states have internal predecessors, (47), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2021-05-06 00:12:59,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:12:59,118 INFO L225 Difference]: With dead ends: 55 [2021-05-06 00:12:59,118 INFO L226 Difference]: Without dead ends: 52 [2021-05-06 00:12:59,119 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 821.9ms TimeCoverageRelationStatistics Valid=87, Invalid=1805, Unknown=0, NotChecked=0, Total=1892 [2021-05-06 00:12:59,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-06 00:12:59,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-05-06 00:12:59,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 48 states have (on average 1.0208333333333333) internal successors, (49), 48 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:59,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2021-05-06 00:12:59,121 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2021-05-06 00:12:59,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:12:59,121 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2021-05-06 00:12:59,121 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 43 states have internal predecessors, (47), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:59,121 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2021-05-06 00:12:59,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-06 00:12:59,121 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:12:59,121 INFO L523 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:12:59,337 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:12:59,337 INFO L428 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:12:59,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:12:59,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1129863857, now seen corresponding path program 40 times [2021-05-06 00:12:59,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:12:59,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541729322] [2021-05-06 00:12:59,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:12:59,342 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:12:59,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1864935330] [2021-05-06 00:12:59,342 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:12:59,415 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 00:12:59,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:12:59,430 WARN L261 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 168 conjunts are in the unsatisfiable core [2021-05-06 00:12:59,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:13:00,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:00,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:00,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:00,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:00,363 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:13:00,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:13:00,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541729322] [2021-05-06 00:13:00,363 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:13:00,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864935330] [2021-05-06 00:13:00,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864935330] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:13:00,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:13:00,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2021-05-06 00:13:00,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874971231] [2021-05-06 00:13:00,364 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-05-06 00:13:00,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:13:00,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-05-06 00:13:00,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2021-05-06 00:13:00,364 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand has 44 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 44 states have internal predecessors, (48), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:13:01,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:13:01,224 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2021-05-06 00:13:01,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-06 00:13:01,224 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 44 states have internal predecessors, (48), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2021-05-06 00:13:01,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:13:01,225 INFO L225 Difference]: With dead ends: 56 [2021-05-06 00:13:01,225 INFO L226 Difference]: Without dead ends: 53 [2021-05-06 00:13:01,225 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 857.1ms TimeCoverageRelationStatistics Valid=89, Invalid=1891, Unknown=0, NotChecked=0, Total=1980 [2021-05-06 00:13:01,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-05-06 00:13:01,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-05-06 00:13:01,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 49 states have (on average 1.0204081632653061) internal successors, (50), 49 states have internal predecessors, (50), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:13:01,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2021-05-06 00:13:01,228 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2021-05-06 00:13:01,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:13:01,228 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2021-05-06 00:13:01,228 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 44 states have internal predecessors, (48), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:13:01,228 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2021-05-06 00:13:01,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-06 00:13:01,228 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:13:01,228 INFO L523 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:13:01,444 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-05-06 00:13:01,445 INFO L428 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:13:01,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:13:01,445 INFO L82 PathProgramCache]: Analyzing trace with hash 665978731, now seen corresponding path program 41 times [2021-05-06 00:13:01,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:13:01,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912855218] [2021-05-06 00:13:01,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:13:01,450 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:13:01,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [665194180] [2021-05-06 00:13:01,450 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:13:01,523 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2021-05-06 00:13:01,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:13:01,526 WARN L261 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 172 conjunts are in the unsatisfiable core [2021-05-06 00:13:01,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:13:02,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:02,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:02,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:02,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:02,457 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:13:02,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:13:02,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912855218] [2021-05-06 00:13:02,458 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:13:02,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665194180] [2021-05-06 00:13:02,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665194180] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:13:02,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:13:02,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2021-05-06 00:13:02,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021322872] [2021-05-06 00:13:02,458 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-05-06 00:13:02,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:13:02,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-05-06 00:13:02,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2021-05-06 00:13:02,459 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand has 45 states, 45 states have (on average 1.0888888888888888) internal successors, (49), 45 states have internal predecessors, (49), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:13:03,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:13:03,396 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2021-05-06 00:13:03,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-06 00:13:03,397 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.0888888888888888) internal successors, (49), 45 states have internal predecessors, (49), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2021-05-06 00:13:03,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:13:03,397 INFO L225 Difference]: With dead ends: 57 [2021-05-06 00:13:03,397 INFO L226 Difference]: Without dead ends: 54 [2021-05-06 00:13:03,398 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 864.9ms TimeCoverageRelationStatistics Valid=91, Invalid=1979, Unknown=0, NotChecked=0, Total=2070 [2021-05-06 00:13:03,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-06 00:13:03,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-05-06 00:13:03,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 50 states have (on average 1.02) internal successors, (51), 50 states have internal predecessors, (51), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:13:03,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2021-05-06 00:13:03,400 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2021-05-06 00:13:03,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:13:03,400 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2021-05-06 00:13:03,400 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 1.0888888888888888) internal successors, (49), 45 states have internal predecessors, (49), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:13:03,400 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2021-05-06 00:13:03,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-05-06 00:13:03,401 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:13:03,401 INFO L523 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:13:03,616 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:13:03,617 INFO L428 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:13:03,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:13:03,617 INFO L82 PathProgramCache]: Analyzing trace with hash -829558287, now seen corresponding path program 42 times [2021-05-06 00:13:03,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:13:03,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795160530] [2021-05-06 00:13:03,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:13:03,623 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:13:03,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [597960289] [2021-05-06 00:13:03,623 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:13:03,704 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2021-05-06 00:13:03,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:13:03,707 WARN L261 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 176 conjunts are in the unsatisfiable core [2021-05-06 00:13:03,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:13:04,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:04,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:04,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:04,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:04,643 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:13:04,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:13:04,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795160530] [2021-05-06 00:13:04,643 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:13:04,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597960289] [2021-05-06 00:13:04,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597960289] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:13:04,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:13:04,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2021-05-06 00:13:04,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40694756] [2021-05-06 00:13:04,643 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-05-06 00:13:04,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:13:04,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-05-06 00:13:04,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2021-05-06 00:13:04,644 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand has 46 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 46 states have internal predecessors, (50), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:13:05,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:13:05,612 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2021-05-06 00:13:05,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-06 00:13:05,612 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 46 states have internal predecessors, (50), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2021-05-06 00:13:05,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:13:05,612 INFO L225 Difference]: With dead ends: 58 [2021-05-06 00:13:05,613 INFO L226 Difference]: Without dead ends: 55 [2021-05-06 00:13:05,613 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 875.0ms TimeCoverageRelationStatistics Valid=93, Invalid=2069, Unknown=0, NotChecked=0, Total=2162 [2021-05-06 00:13:05,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-06 00:13:05,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-05-06 00:13:05,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 51 states have (on average 1.0196078431372548) internal successors, (52), 51 states have internal predecessors, (52), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:13:05,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2021-05-06 00:13:05,615 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2021-05-06 00:13:05,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:13:05,615 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2021-05-06 00:13:05,615 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 46 states have internal predecessors, (50), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:13:05,615 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2021-05-06 00:13:05,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-06 00:13:05,616 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:13:05,616 INFO L523 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:13:05,832 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-05-06 00:13:05,832 INFO L428 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:13:05,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:13:05,832 INFO L82 PathProgramCache]: Analyzing trace with hash 53434411, now seen corresponding path program 43 times [2021-05-06 00:13:05,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:13:05,832 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345526896] [2021-05-06 00:13:05,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:13:05,838 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:13:05,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [188723858] [2021-05-06 00:13:05,838 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:13:05,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 00:13:05,903 WARN L261 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 180 conjunts are in the unsatisfiable core [2021-05-06 00:13:05,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:13:06,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:06,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:06,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:06,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:06,875 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:13:06,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:13:06,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345526896] [2021-05-06 00:13:06,875 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:13:06,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188723858] [2021-05-06 00:13:06,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188723858] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:13:06,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:13:06,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2021-05-06 00:13:06,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119561134] [2021-05-06 00:13:06,876 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-05-06 00:13:06,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:13:06,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-05-06 00:13:06,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2021-05-06 00:13:06,876 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand has 47 states, 47 states have (on average 1.0851063829787233) internal successors, (51), 47 states have internal predecessors, (51), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:13:07,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:13:07,917 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2021-05-06 00:13:07,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-06 00:13:07,917 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.0851063829787233) internal successors, (51), 47 states have internal predecessors, (51), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2021-05-06 00:13:07,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:13:07,918 INFO L225 Difference]: With dead ends: 59 [2021-05-06 00:13:07,918 INFO L226 Difference]: Without dead ends: 56 [2021-05-06 00:13:07,918 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 892.6ms TimeCoverageRelationStatistics Valid=95, Invalid=2161, Unknown=0, NotChecked=0, Total=2256 [2021-05-06 00:13:07,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-06 00:13:07,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-05-06 00:13:07,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 52 states have (on average 1.0192307692307692) internal successors, (53), 52 states have internal predecessors, (53), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:13:07,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2021-05-06 00:13:07,920 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2021-05-06 00:13:07,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:13:07,921 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2021-05-06 00:13:07,921 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.0851063829787233) internal successors, (51), 47 states have internal predecessors, (51), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:13:07,921 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2021-05-06 00:13:07,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-06 00:13:07,921 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:13:07,921 INFO L523 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:13:08,128 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-05-06 00:13:08,129 INFO L428 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:13:08,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:13:08,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1656404273, now seen corresponding path program 44 times [2021-05-06 00:13:08,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:13:08,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284513230] [2021-05-06 00:13:08,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:13:08,134 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:13:08,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1406819097] [2021-05-06 00:13:08,134 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:13:08,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 00:13:08,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:13:08,209 WARN L261 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 184 conjunts are in the unsatisfiable core [2021-05-06 00:13:08,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:13:09,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:09,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:09,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:09,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:09,260 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:13:09,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:13:09,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284513230] [2021-05-06 00:13:09,260 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:13:09,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406819097] [2021-05-06 00:13:09,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406819097] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:13:09,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:13:09,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2021-05-06 00:13:09,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498026982] [2021-05-06 00:13:09,261 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-05-06 00:13:09,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:13:09,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-05-06 00:13:09,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=2163, Unknown=0, NotChecked=0, Total=2256 [2021-05-06 00:13:09,261 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand has 48 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 48 states have internal predecessors, (52), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:13:10,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:13:10,407 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2021-05-06 00:13:10,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-06 00:13:10,407 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 48 states have internal predecessors, (52), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2021-05-06 00:13:10,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:13:10,407 INFO L225 Difference]: With dead ends: 60 [2021-05-06 00:13:10,407 INFO L226 Difference]: Without dead ends: 57 [2021-05-06 00:13:10,408 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 990.7ms TimeCoverageRelationStatistics Valid=97, Invalid=2255, Unknown=0, NotChecked=0, Total=2352 [2021-05-06 00:13:10,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-05-06 00:13:10,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-05-06 00:13:10,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 53 states have (on average 1.0188679245283019) internal successors, (54), 53 states have internal predecessors, (54), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:13:10,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2021-05-06 00:13:10,410 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2021-05-06 00:13:10,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:13:10,410 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2021-05-06 00:13:10,410 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 48 states have internal predecessors, (52), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:13:10,411 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2021-05-06 00:13:10,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-06 00:13:10,411 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:13:10,411 INFO L523 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:13:10,611 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:13:10,611 INFO L428 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:13:10,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:13:10,611 INFO L82 PathProgramCache]: Analyzing trace with hash -191137557, now seen corresponding path program 45 times [2021-05-06 00:13:10,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:13:10,612 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042397162] [2021-05-06 00:13:10,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:13:10,617 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:13:10,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [131025989] [2021-05-06 00:13:10,617 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:13:10,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2021-05-06 00:13:10,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:13:10,730 WARN L261 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 188 conjunts are in the unsatisfiable core [2021-05-06 00:13:10,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:13:11,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:11,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:11,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:11,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:11,757 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:13:11,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:13:11,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042397162] [2021-05-06 00:13:11,757 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:13:11,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131025989] [2021-05-06 00:13:11,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131025989] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:13:11,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:13:11,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2021-05-06 00:13:11,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635212021] [2021-05-06 00:13:11,757 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-05-06 00:13:11,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:13:11,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-05-06 00:13:11,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2021-05-06 00:13:11,758 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand has 49 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 49 states have internal predecessors, (53), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:13:12,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:13:12,922 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2021-05-06 00:13:12,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-06 00:13:12,922 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 49 states have internal predecessors, (53), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2021-05-06 00:13:12,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:13:12,922 INFO L225 Difference]: With dead ends: 61 [2021-05-06 00:13:12,922 INFO L226 Difference]: Without dead ends: 58 [2021-05-06 00:13:12,923 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 958.6ms TimeCoverageRelationStatistics Valid=99, Invalid=2351, Unknown=0, NotChecked=0, Total=2450 [2021-05-06 00:13:12,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-06 00:13:12,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-05-06 00:13:12,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 54 states have (on average 1.0185185185185186) internal successors, (55), 54 states have internal predecessors, (55), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:13:12,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2021-05-06 00:13:12,925 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2021-05-06 00:13:12,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:13:12,925 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2021-05-06 00:13:12,925 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 49 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 49 states have internal predecessors, (53), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:13:12,925 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2021-05-06 00:13:12,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-06 00:13:12,926 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:13:12,926 INFO L523 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:13:13,126 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-05-06 00:13:13,126 INFO L428 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:13:13,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:13:13,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1630359439, now seen corresponding path program 46 times [2021-05-06 00:13:13,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:13:13,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303440994] [2021-05-06 00:13:13,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:13:13,132 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:13:13,132 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [832840213] [2021-05-06 00:13:13,132 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:13:13,218 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 00:13:13,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:13:13,241 WARN L261 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 192 conjunts are in the unsatisfiable core [2021-05-06 00:13:13,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:13:14,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:14,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:14,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:14,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:14,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:13:14,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:13:14,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303440994] [2021-05-06 00:13:14,344 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:13:14,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832840213] [2021-05-06 00:13:14,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832840213] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:13:14,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:13:14,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2021-05-06 00:13:14,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633910985] [2021-05-06 00:13:14,344 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-05-06 00:13:14,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:13:14,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-05-06 00:13:14,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=2353, Unknown=0, NotChecked=0, Total=2450 [2021-05-06 00:13:14,345 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand has 50 states, 50 states have (on average 1.08) internal successors, (54), 50 states have internal predecessors, (54), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:13:15,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:13:15,541 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2021-05-06 00:13:15,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-06 00:13:15,541 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.08) internal successors, (54), 50 states have internal predecessors, (54), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2021-05-06 00:13:15,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:13:15,541 INFO L225 Difference]: With dead ends: 62 [2021-05-06 00:13:15,541 INFO L226 Difference]: Without dead ends: 59 [2021-05-06 00:13:15,542 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1042.8ms TimeCoverageRelationStatistics Valid=101, Invalid=2449, Unknown=0, NotChecked=0, Total=2550 [2021-05-06 00:13:15,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-05-06 00:13:15,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-05-06 00:13:15,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 55 states have (on average 1.018181818181818) internal successors, (56), 55 states have internal predecessors, (56), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:13:15,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2021-05-06 00:13:15,544 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2021-05-06 00:13:15,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:13:15,544 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2021-05-06 00:13:15,545 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 1.08) internal successors, (54), 50 states have internal predecessors, (54), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:13:15,545 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2021-05-06 00:13:15,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-06 00:13:15,545 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:13:15,545 INFO L523 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:13:15,761 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-05-06 00:13:15,761 INFO L428 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:13:15,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:13:15,761 INFO L82 PathProgramCache]: Analyzing trace with hash 998402475, now seen corresponding path program 47 times [2021-05-06 00:13:15,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:13:15,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464574360] [2021-05-06 00:13:15,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:13:15,767 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:13:15,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1799531250] [2021-05-06 00:13:15,767 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:13:15,849 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2021-05-06 00:13:15,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:13:15,851 WARN L261 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 196 conjunts are in the unsatisfiable core [2021-05-06 00:13:15,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:13:16,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:16,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:16,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:16,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:16,991 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:13:16,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:13:16,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464574360] [2021-05-06 00:13:16,991 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:13:16,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799531250] [2021-05-06 00:13:16,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799531250] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:13:16,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:13:16,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2021-05-06 00:13:16,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655529307] [2021-05-06 00:13:16,991 INFO L460 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-05-06 00:13:16,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:13:16,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-05-06 00:13:16,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2021-05-06 00:13:16,992 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand has 51 states, 51 states have (on average 1.0784313725490196) internal successors, (55), 51 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:13:18,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:13:18,266 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2021-05-06 00:13:18,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-06 00:13:18,266 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.0784313725490196) internal successors, (55), 51 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2021-05-06 00:13:18,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:13:18,267 INFO L225 Difference]: With dead ends: 63 [2021-05-06 00:13:18,267 INFO L226 Difference]: Without dead ends: 60 [2021-05-06 00:13:18,267 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1080.2ms TimeCoverageRelationStatistics Valid=103, Invalid=2549, Unknown=0, NotChecked=0, Total=2652 [2021-05-06 00:13:18,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-06 00:13:18,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-05-06 00:13:18,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 56 states have (on average 1.0178571428571428) internal successors, (57), 56 states have internal predecessors, (57), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:13:18,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2021-05-06 00:13:18,271 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2021-05-06 00:13:18,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:13:18,271 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2021-05-06 00:13:18,271 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 1.0784313725490196) internal successors, (55), 51 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:13:18,271 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2021-05-06 00:13:18,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-05-06 00:13:18,272 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:13:18,272 INFO L523 BasicCegarLoop]: trace histogram [48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:13:18,495 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-05-06 00:13:18,495 INFO L428 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:13:18,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:13:18,496 INFO L82 PathProgramCache]: Analyzing trace with hash 885643185, now seen corresponding path program 48 times [2021-05-06 00:13:18,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:13:18,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120730181] [2021-05-06 00:13:18,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:13:18,501 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:13:18,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2127684851] [2021-05-06 00:13:18,501 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:13:18,594 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2021-05-06 00:13:18,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:13:18,598 WARN L261 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 200 conjunts are in the unsatisfiable core [2021-05-06 00:13:18,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:13:19,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:19,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:19,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:19,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:19,792 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:13:19,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:13:19,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120730181] [2021-05-06 00:13:19,792 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:13:19,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127684851] [2021-05-06 00:13:19,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127684851] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:13:19,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:13:19,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2021-05-06 00:13:19,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920468227] [2021-05-06 00:13:19,793 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-05-06 00:13:19,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:13:19,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-05-06 00:13:19,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=2551, Unknown=0, NotChecked=0, Total=2652 [2021-05-06 00:13:19,793 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand has 52 states, 52 states have (on average 1.0769230769230769) internal successors, (56), 52 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:13:21,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:13:21,137 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2021-05-06 00:13:21,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-06 00:13:21,137 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.0769230769230769) internal successors, (56), 52 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2021-05-06 00:13:21,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:13:21,138 INFO L225 Difference]: With dead ends: 64 [2021-05-06 00:13:21,138 INFO L226 Difference]: Without dead ends: 61 [2021-05-06 00:13:21,138 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1129.1ms TimeCoverageRelationStatistics Valid=105, Invalid=2651, Unknown=0, NotChecked=0, Total=2756 [2021-05-06 00:13:21,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-05-06 00:13:21,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2021-05-06 00:13:21,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 57 states have (on average 1.0175438596491229) internal successors, (58), 57 states have internal predecessors, (58), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:13:21,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2021-05-06 00:13:21,141 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2021-05-06 00:13:21,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:13:21,141 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2021-05-06 00:13:21,141 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 52 states, 52 states have (on average 1.0769230769230769) internal successors, (56), 52 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:13:21,141 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2021-05-06 00:13:21,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-05-06 00:13:21,141 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:13:21,142 INFO L523 BasicCegarLoop]: trace histogram [49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:13:21,352 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:13:21,353 INFO L428 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:13:21,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:13:21,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1685072491, now seen corresponding path program 49 times [2021-05-06 00:13:21,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:13:21,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354824618] [2021-05-06 00:13:21,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:13:21,359 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:13:21,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [353258484] [2021-05-06 00:13:21,360 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:13:21,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 00:13:21,436 WARN L261 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 204 conjunts are in the unsatisfiable core [2021-05-06 00:13:21,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:13:22,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:22,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:22,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:22,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:22,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:13:22,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:13:22,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354824618] [2021-05-06 00:13:22,699 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:13:22,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353258484] [2021-05-06 00:13:22,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353258484] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:13:22,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:13:22,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2021-05-06 00:13:22,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345379328] [2021-05-06 00:13:22,699 INFO L460 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-05-06 00:13:22,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:13:22,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-05-06 00:13:22,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2021-05-06 00:13:22,700 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand has 53 states, 53 states have (on average 1.0754716981132075) internal successors, (57), 53 states have internal predecessors, (57), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:13:24,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:13:24,220 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2021-05-06 00:13:24,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-05-06 00:13:24,221 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.0754716981132075) internal successors, (57), 53 states have internal predecessors, (57), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2021-05-06 00:13:24,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:13:24,221 INFO L225 Difference]: With dead ends: 65 [2021-05-06 00:13:24,221 INFO L226 Difference]: Without dead ends: 62 [2021-05-06 00:13:24,221 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1199.1ms TimeCoverageRelationStatistics Valid=107, Invalid=2755, Unknown=0, NotChecked=0, Total=2862 [2021-05-06 00:13:24,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-05-06 00:13:24,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-05-06 00:13:24,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 58 states have (on average 1.0172413793103448) internal successors, (59), 58 states have internal predecessors, (59), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:13:24,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2021-05-06 00:13:24,224 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2021-05-06 00:13:24,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:13:24,224 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2021-05-06 00:13:24,224 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 53 states, 53 states have (on average 1.0754716981132075) internal successors, (57), 53 states have internal predecessors, (57), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:13:24,224 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2021-05-06 00:13:24,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-06 00:13:24,225 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:13:24,225 INFO L523 BasicCegarLoop]: trace histogram [50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:13:24,432 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-05-06 00:13:24,433 INFO L428 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:13:24,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:13:24,433 INFO L82 PathProgramCache]: Analyzing trace with hash 697577201, now seen corresponding path program 50 times [2021-05-06 00:13:24,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:13:24,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846445272] [2021-05-06 00:13:24,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:13:24,439 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:13:24,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1835619085] [2021-05-06 00:13:24,440 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:13:24,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 00:13:24,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:13:24,532 WARN L261 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 208 conjunts are in the unsatisfiable core [2021-05-06 00:13:24,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:13:25,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:25,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:25,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:25,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:25,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:13:25,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:13:25,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846445272] [2021-05-06 00:13:25,796 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:13:25,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835619085] [2021-05-06 00:13:25,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835619085] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:13:25,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:13:25,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2021-05-06 00:13:25,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638625352] [2021-05-06 00:13:25,797 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-05-06 00:13:25,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:13:25,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-05-06 00:13:25,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=2757, Unknown=0, NotChecked=0, Total=2862 [2021-05-06 00:13:25,797 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:13:27,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:13:27,294 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2021-05-06 00:13:27,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-06 00:13:27,294 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2021-05-06 00:13:27,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:13:27,294 INFO L225 Difference]: With dead ends: 66 [2021-05-06 00:13:27,294 INFO L226 Difference]: Without dead ends: 63 [2021-05-06 00:13:27,295 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1195.5ms TimeCoverageRelationStatistics Valid=109, Invalid=2861, Unknown=0, NotChecked=0, Total=2970 [2021-05-06 00:13:27,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-05-06 00:13:27,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-05-06 00:13:27,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 59 states have (on average 1.0169491525423728) internal successors, (60), 59 states have internal predecessors, (60), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:13:27,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2021-05-06 00:13:27,298 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2021-05-06 00:13:27,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:13:27,298 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2021-05-06 00:13:27,298 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:13:27,298 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2021-05-06 00:13:27,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-05-06 00:13:27,298 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:13:27,298 INFO L523 BasicCegarLoop]: trace histogram [51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:13:27,504 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2021-05-06 00:13:27,505 INFO L428 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:13:27,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:13:27,505 INFO L82 PathProgramCache]: Analyzing trace with hash 149994283, now seen corresponding path program 51 times [2021-05-06 00:13:27,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:13:27,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82237982] [2021-05-06 00:13:27,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:13:27,511 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:13:27,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1418008108] [2021-05-06 00:13:27,511 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:13:27,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2021-05-06 00:13:27,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:13:27,600 WARN L261 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 213 conjunts are in the unsatisfiable core [2021-05-06 00:13:27,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:13:29,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:29,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:29,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:29,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:29,097 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:13:29,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:13:29,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82237982] [2021-05-06 00:13:29,097 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:13:29,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418008108] [2021-05-06 00:13:29,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418008108] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:13:29,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:13:29,097 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2021-05-06 00:13:29,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322986585] [2021-05-06 00:13:29,098 INFO L460 AbstractCegarLoop]: Interpolant automaton has 56 states [2021-05-06 00:13:29,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:13:29,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-05-06 00:13:29,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=2919, Unknown=0, NotChecked=0, Total=3080 [2021-05-06 00:13:29,098 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand has 56 states, 56 states have (on average 1.0535714285714286) internal successors, (59), 56 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:13:30,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:13:30,869 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2021-05-06 00:13:30,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-06 00:13:30,870 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.0535714285714286) internal successors, (59), 56 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2021-05-06 00:13:30,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:13:30,870 INFO L225 Difference]: With dead ends: 67 [2021-05-06 00:13:30,870 INFO L226 Difference]: Without dead ends: 64 [2021-05-06 00:13:30,870 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1421.6ms TimeCoverageRelationStatistics Valid=166, Invalid=3026, Unknown=0, NotChecked=0, Total=3192 [2021-05-06 00:13:30,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-06 00:13:30,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-05-06 00:13:30,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 60 states have (on average 1.0166666666666666) internal successors, (61), 60 states have internal predecessors, (61), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:13:30,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2021-05-06 00:13:30,873 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2021-05-06 00:13:30,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:13:30,873 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2021-05-06 00:13:30,873 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 56 states, 56 states have (on average 1.0535714285714286) internal successors, (59), 56 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:13:30,874 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2021-05-06 00:13:30,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-05-06 00:13:30,874 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:13:30,874 INFO L523 BasicCegarLoop]: trace histogram [52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:13:31,084 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:13:31,085 INFO L428 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:13:31,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:13:31,085 INFO L82 PathProgramCache]: Analyzing trace with hash 354793009, now seen corresponding path program 52 times [2021-05-06 00:13:31,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:13:31,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466652409] [2021-05-06 00:13:31,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:13:31,090 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:13:31,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1105791374] [2021-05-06 00:13:31,090 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:13:31,156 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 00:13:31,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:13:31,160 WARN L261 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 216 conjunts are in the unsatisfiable core [2021-05-06 00:13:31,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:13:32,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:32,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:32,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:32,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:32,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:13:32,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:13:32,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466652409] [2021-05-06 00:13:32,541 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:13:32,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105791374] [2021-05-06 00:13:32,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105791374] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:13:32,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:13:32,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2021-05-06 00:13:32,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048256536] [2021-05-06 00:13:32,541 INFO L460 AbstractCegarLoop]: Interpolant automaton has 56 states [2021-05-06 00:13:32,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:13:32,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-05-06 00:13:32,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=2971, Unknown=0, NotChecked=0, Total=3080 [2021-05-06 00:13:32,542 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand has 56 states, 56 states have (on average 1.0714285714285714) internal successors, (60), 56 states have internal predecessors, (60), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:13:34,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:13:34,322 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2021-05-06 00:13:34,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-06 00:13:34,323 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.0714285714285714) internal successors, (60), 56 states have internal predecessors, (60), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2021-05-06 00:13:34,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:13:34,323 INFO L225 Difference]: With dead ends: 68 [2021-05-06 00:13:34,323 INFO L226 Difference]: Without dead ends: 65 [2021-05-06 00:13:34,323 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1307.2ms TimeCoverageRelationStatistics Valid=113, Invalid=3079, Unknown=0, NotChecked=0, Total=3192 [2021-05-06 00:13:34,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-05-06 00:13:34,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-05-06 00:13:34,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 61 states have (on average 1.0163934426229508) internal successors, (62), 61 states have internal predecessors, (62), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:13:34,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2021-05-06 00:13:34,326 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2021-05-06 00:13:34,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:13:34,326 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2021-05-06 00:13:34,326 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 56 states, 56 states have (on average 1.0714285714285714) internal successors, (60), 56 states have internal predecessors, (60), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:13:34,326 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2021-05-06 00:13:34,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-06 00:13:34,326 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:13:34,326 INFO L523 BasicCegarLoop]: trace histogram [53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:13:34,537 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable154 [2021-05-06 00:13:34,537 INFO L428 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:13:34,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:13:34,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1886381077, now seen corresponding path program 53 times [2021-05-06 00:13:34,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:13:34,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193631948] [2021-05-06 00:13:34,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:13:34,543 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:13:34,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1018775645] [2021-05-06 00:13:34,543 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:13:34,625 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2021-05-06 00:13:34,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:13:34,629 WARN L261 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 220 conjunts are in the unsatisfiable core [2021-05-06 00:13:34,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:13:36,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:36,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:36,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:36,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:36,054 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:13:36,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:13:36,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193631948] [2021-05-06 00:13:36,054 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:13:36,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018775645] [2021-05-06 00:13:36,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018775645] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:13:36,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:13:36,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2021-05-06 00:13:36,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475484455] [2021-05-06 00:13:36,055 INFO L460 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-05-06 00:13:36,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:13:36,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-05-06 00:13:36,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2021-05-06 00:13:36,055 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand has 57 states, 57 states have (on average 1.0701754385964912) internal successors, (61), 57 states have internal predecessors, (61), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:13:37,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:13:37,929 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2021-05-06 00:13:37,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-05-06 00:13:37,929 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.0701754385964912) internal successors, (61), 57 states have internal predecessors, (61), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2021-05-06 00:13:37,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:13:37,930 INFO L225 Difference]: With dead ends: 69 [2021-05-06 00:13:37,930 INFO L226 Difference]: Without dead ends: 66 [2021-05-06 00:13:37,930 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1346.9ms TimeCoverageRelationStatistics Valid=115, Invalid=3191, Unknown=0, NotChecked=0, Total=3306 [2021-05-06 00:13:37,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-05-06 00:13:37,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-05-06 00:13:37,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 62 states have (on average 1.0161290322580645) internal successors, (63), 62 states have internal predecessors, (63), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:13:37,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2021-05-06 00:13:37,933 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2021-05-06 00:13:37,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:13:37,933 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2021-05-06 00:13:37,933 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 57 states, 57 states have (on average 1.0701754385964912) internal successors, (61), 57 states have internal predecessors, (61), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:13:37,933 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2021-05-06 00:13:37,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-06 00:13:37,933 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:13:37,933 INFO L523 BasicCegarLoop]: trace histogram [54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:13:38,133 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-05-06 00:13:38,134 INFO L428 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:13:38,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:13:38,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1651666289, now seen corresponding path program 54 times [2021-05-06 00:13:38,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:13:38,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036199394] [2021-05-06 00:13:38,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:13:38,139 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:13:38,140 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1372846745] [2021-05-06 00:13:38,140 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:13:38,240 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2021-05-06 00:13:38,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:13:38,243 WARN L261 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 224 conjunts are in the unsatisfiable core [2021-05-06 00:13:38,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:13:39,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:39,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:39,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:39,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:39,826 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:13:39,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:13:39,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036199394] [2021-05-06 00:13:39,827 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:13:39,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372846745] [2021-05-06 00:13:39,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372846745] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:13:39,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:13:39,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2021-05-06 00:13:39,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128749153] [2021-05-06 00:13:39,827 INFO L460 AbstractCegarLoop]: Interpolant automaton has 58 states [2021-05-06 00:13:39,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:13:39,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-05-06 00:13:39,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=3193, Unknown=0, NotChecked=0, Total=3306 [2021-05-06 00:13:39,828 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand has 58 states, 58 states have (on average 1.0689655172413792) internal successors, (62), 58 states have internal predecessors, (62), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:13:41,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:13:41,952 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2021-05-06 00:13:41,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-05-06 00:13:41,952 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.0689655172413792) internal successors, (62), 58 states have internal predecessors, (62), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2021-05-06 00:13:41,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:13:41,952 INFO L225 Difference]: With dead ends: 70 [2021-05-06 00:13:41,952 INFO L226 Difference]: Without dead ends: 67 [2021-05-06 00:13:41,953 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1495.6ms TimeCoverageRelationStatistics Valid=117, Invalid=3305, Unknown=0, NotChecked=0, Total=3422 [2021-05-06 00:13:41,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-05-06 00:13:41,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2021-05-06 00:13:41,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 63 states have (on average 1.0158730158730158) internal successors, (64), 63 states have internal predecessors, (64), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:13:41,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2021-05-06 00:13:41,956 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2021-05-06 00:13:41,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:13:41,956 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2021-05-06 00:13:41,956 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 58 states, 58 states have (on average 1.0689655172413792) internal successors, (62), 58 states have internal predecessors, (62), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:13:41,956 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2021-05-06 00:13:41,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-06 00:13:41,956 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:13:41,956 INFO L523 BasicCegarLoop]: trace histogram [55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:13:42,172 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:13:42,173 INFO L428 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:13:42,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:13:42,173 INFO L82 PathProgramCache]: Analyzing trace with hash -338015061, now seen corresponding path program 55 times [2021-05-06 00:13:42,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:13:42,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318816121] [2021-05-06 00:13:42,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:13:42,178 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:13:42,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1225906654] [2021-05-06 00:13:42,179 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:13:42,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 00:13:42,245 WARN L261 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 228 conjunts are in the unsatisfiable core [2021-05-06 00:13:42,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:13:43,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:43,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:43,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:43,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:43,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:13:43,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:13:43,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318816121] [2021-05-06 00:13:43,738 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:13:43,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225906654] [2021-05-06 00:13:43,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225906654] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:13:43,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:13:43,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2021-05-06 00:13:43,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979394153] [2021-05-06 00:13:43,738 INFO L460 AbstractCegarLoop]: Interpolant automaton has 59 states [2021-05-06 00:13:43,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:13:43,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-05-06 00:13:43,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2021-05-06 00:13:43,738 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand has 59 states, 59 states have (on average 1.0677966101694916) internal successors, (63), 59 states have internal predecessors, (63), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:13:46,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:13:46,031 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2021-05-06 00:13:46,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-05-06 00:13:46,031 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.0677966101694916) internal successors, (63), 59 states have internal predecessors, (63), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2021-05-06 00:13:46,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:13:46,032 INFO L225 Difference]: With dead ends: 71 [2021-05-06 00:13:46,032 INFO L226 Difference]: Without dead ends: 68 [2021-05-06 00:13:46,032 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1421.9ms TimeCoverageRelationStatistics Valid=119, Invalid=3421, Unknown=0, NotChecked=0, Total=3540 [2021-05-06 00:13:46,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-06 00:13:46,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-05-06 00:13:46,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 64 states have (on average 1.015625) internal successors, (65), 64 states have internal predecessors, (65), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:13:46,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2021-05-06 00:13:46,035 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2021-05-06 00:13:46,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:13:46,035 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2021-05-06 00:13:46,035 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 59 states, 59 states have (on average 1.0677966101694916) internal successors, (63), 59 states have internal predecessors, (63), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:13:46,035 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2021-05-06 00:13:46,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-05-06 00:13:46,035 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:13:46,035 INFO L523 BasicCegarLoop]: trace histogram [56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:13:46,248 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:13:46,249 INFO L428 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:13:46,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:13:46,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1888594767, now seen corresponding path program 56 times [2021-05-06 00:13:46,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:13:46,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820517226] [2021-05-06 00:13:46,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:13:46,254 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:13:46,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [173706489] [2021-05-06 00:13:46,255 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:13:46,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 00:13:46,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:13:46,349 WARN L261 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 232 conjunts are in the unsatisfiable core [2021-05-06 00:13:46,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:13:47,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:47,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:47,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:47,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:48,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:13:48,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:13:48,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820517226] [2021-05-06 00:13:48,009 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:13:48,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173706489] [2021-05-06 00:13:48,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173706489] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:13:48,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:13:48,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2021-05-06 00:13:48,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756653858] [2021-05-06 00:13:48,009 INFO L460 AbstractCegarLoop]: Interpolant automaton has 60 states [2021-05-06 00:13:48,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:13:48,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-05-06 00:13:48,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=3423, Unknown=0, NotChecked=0, Total=3540 [2021-05-06 00:13:48,010 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand has 60 states, 60 states have (on average 1.0666666666666667) internal successors, (64), 60 states have internal predecessors, (64), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:13:50,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:13:50,318 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2021-05-06 00:13:50,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-05-06 00:13:50,319 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.0666666666666667) internal successors, (64), 60 states have internal predecessors, (64), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 67 [2021-05-06 00:13:50,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:13:50,319 INFO L225 Difference]: With dead ends: 72 [2021-05-06 00:13:50,319 INFO L226 Difference]: Without dead ends: 69 [2021-05-06 00:13:50,319 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1577.0ms TimeCoverageRelationStatistics Valid=121, Invalid=3539, Unknown=0, NotChecked=0, Total=3660 [2021-05-06 00:13:50,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-06 00:13:50,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-05-06 00:13:50,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 65 states have (on average 1.0153846153846153) internal successors, (66), 65 states have internal predecessors, (66), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:13:50,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2021-05-06 00:13:50,323 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2021-05-06 00:13:50,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:13:50,323 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2021-05-06 00:13:50,323 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 60 states, 60 states have (on average 1.0666666666666667) internal successors, (64), 60 states have internal predecessors, (64), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:13:50,323 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2021-05-06 00:13:50,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-06 00:13:50,323 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:13:50,323 INFO L523 BasicCegarLoop]: trace histogram [57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:13:50,523 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:13:50,524 INFO L428 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:13:50,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:13:50,524 INFO L82 PathProgramCache]: Analyzing trace with hash 1583041899, now seen corresponding path program 57 times [2021-05-06 00:13:50,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:13:50,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980514481] [2021-05-06 00:13:50,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:13:50,535 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:13:50,536 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [830168153] [2021-05-06 00:13:50,536 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:13:50,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2021-05-06 00:13:50,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:13:50,627 WARN L261 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 237 conjunts are in the unsatisfiable core [2021-05-06 00:13:50,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:13:52,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:52,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:52,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:52,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:52,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:13:52,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:13:52,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980514481] [2021-05-06 00:13:52,401 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:13:52,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830168153] [2021-05-06 00:13:52,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830168153] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:13:52,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:13:52,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2021-05-06 00:13:52,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267136644] [2021-05-06 00:13:52,402 INFO L460 AbstractCegarLoop]: Interpolant automaton has 62 states [2021-05-06 00:13:52,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:13:52,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-05-06 00:13:52,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=3603, Unknown=0, NotChecked=0, Total=3782 [2021-05-06 00:13:52,402 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand has 62 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 62 states have internal predecessors, (65), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:13:54,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:13:54,951 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2021-05-06 00:13:54,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-05-06 00:13:54,952 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 62 states have internal predecessors, (65), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2021-05-06 00:13:54,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:13:54,952 INFO L225 Difference]: With dead ends: 73 [2021-05-06 00:13:54,952 INFO L226 Difference]: Without dead ends: 70 [2021-05-06 00:13:54,952 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1701.0ms TimeCoverageRelationStatistics Valid=184, Invalid=3722, Unknown=0, NotChecked=0, Total=3906 [2021-05-06 00:13:54,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-05-06 00:13:54,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2021-05-06 00:13:54,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 66 states have (on average 1.0151515151515151) internal successors, (67), 66 states have internal predecessors, (67), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:13:54,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2021-05-06 00:13:54,956 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2021-05-06 00:13:54,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:13:54,956 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2021-05-06 00:13:54,956 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 62 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 62 states have internal predecessors, (65), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:13:54,956 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2021-05-06 00:13:54,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-06 00:13:54,956 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:13:54,956 INFO L523 BasicCegarLoop]: trace histogram [58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:13:55,172 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-05-06 00:13:55,173 INFO L428 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:13:55,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:13:55,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1829596145, now seen corresponding path program 58 times [2021-05-06 00:13:55,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:13:55,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032319640] [2021-05-06 00:13:55,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:13:55,179 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:13:55,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1244139691] [2021-05-06 00:13:55,179 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:13:55,258 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 00:13:55,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:13:55,263 WARN L261 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 240 conjunts are in the unsatisfiable core [2021-05-06 00:13:55,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:13:56,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:56,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:56,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:56,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:56,931 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:13:56,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:13:56,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032319640] [2021-05-06 00:13:56,931 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:13:56,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244139691] [2021-05-06 00:13:56,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244139691] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:13:56,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:13:56,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2021-05-06 00:13:56,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863424013] [2021-05-06 00:13:56,932 INFO L460 AbstractCegarLoop]: Interpolant automaton has 62 states [2021-05-06 00:13:56,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:13:56,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-05-06 00:13:56,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=3661, Unknown=0, NotChecked=0, Total=3782 [2021-05-06 00:13:56,932 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand has 62 states, 62 states have (on average 1.064516129032258) internal successors, (66), 62 states have internal predecessors, (66), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:13:59,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:13:59,474 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2021-05-06 00:13:59,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-05-06 00:13:59,474 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.064516129032258) internal successors, (66), 62 states have internal predecessors, (66), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2021-05-06 00:13:59,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:13:59,475 INFO L225 Difference]: With dead ends: 74 [2021-05-06 00:13:59,475 INFO L226 Difference]: Without dead ends: 71 [2021-05-06 00:13:59,475 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1595.6ms TimeCoverageRelationStatistics Valid=125, Invalid=3781, Unknown=0, NotChecked=0, Total=3906 [2021-05-06 00:13:59,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-05-06 00:13:59,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-05-06 00:13:59,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 67 states have (on average 1.0149253731343284) internal successors, (68), 67 states have internal predecessors, (68), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:13:59,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2021-05-06 00:13:59,478 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2021-05-06 00:13:59,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:13:59,478 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2021-05-06 00:13:59,478 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 62 states, 62 states have (on average 1.064516129032258) internal successors, (66), 62 states have internal predecessors, (66), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:13:59,479 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2021-05-06 00:13:59,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-05-06 00:13:59,479 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:13:59,479 INFO L523 BasicCegarLoop]: trace histogram [59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:13:59,694 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:13:59,694 INFO L428 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:13:59,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:13:59,694 INFO L82 PathProgramCache]: Analyzing trace with hash 882843179, now seen corresponding path program 59 times [2021-05-06 00:13:59,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:13:59,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175536709] [2021-05-06 00:13:59,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:13:59,700 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:13:59,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1003117096] [2021-05-06 00:13:59,700 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:13:59,806 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2021-05-06 00:13:59,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:13:59,810 WARN L261 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 244 conjunts are in the unsatisfiable core [2021-05-06 00:13:59,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:14:01,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:14:01,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:14:01,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:14:01,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:14:01,714 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:14:01,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:14:01,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175536709] [2021-05-06 00:14:01,714 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:14:01,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003117096] [2021-05-06 00:14:01,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003117096] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:14:01,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:14:01,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2021-05-06 00:14:01,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270641558] [2021-05-06 00:14:01,715 INFO L460 AbstractCegarLoop]: Interpolant automaton has 63 states [2021-05-06 00:14:01,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:14:01,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-05-06 00:14:01,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2021-05-06 00:14:01,715 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand has 63 states, 63 states have (on average 1.0634920634920635) internal successors, (67), 63 states have internal predecessors, (67), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:14:04,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:14:04,626 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2021-05-06 00:14:04,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-05-06 00:14:04,627 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.0634920634920635) internal successors, (67), 63 states have internal predecessors, (67), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2021-05-06 00:14:04,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:14:04,627 INFO L225 Difference]: With dead ends: 75 [2021-05-06 00:14:04,627 INFO L226 Difference]: Without dead ends: 72 [2021-05-06 00:14:04,627 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1830.5ms TimeCoverageRelationStatistics Valid=127, Invalid=3905, Unknown=0, NotChecked=0, Total=4032 [2021-05-06 00:14:04,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-05-06 00:14:04,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2021-05-06 00:14:04,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 68 states have (on average 1.0147058823529411) internal successors, (69), 68 states have internal predecessors, (69), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:14:04,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2021-05-06 00:14:04,631 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2021-05-06 00:14:04,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:14:04,631 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2021-05-06 00:14:04,631 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 63 states, 63 states have (on average 1.0634920634920635) internal successors, (67), 63 states have internal predecessors, (67), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:14:04,631 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2021-05-06 00:14:04,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-05-06 00:14:04,631 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:14:04,631 INFO L523 BasicCegarLoop]: trace histogram [60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:14:04,840 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:14:04,841 INFO L428 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:14:04,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:14:04,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1598272305, now seen corresponding path program 60 times [2021-05-06 00:14:04,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:14:04,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343753873] [2021-05-06 00:14:04,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:14:04,848 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:14:04,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [748638785] [2021-05-06 00:14:04,848 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:14:05,052 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2021-05-06 00:14:05,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:14:05,059 WARN L261 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 248 conjunts are in the unsatisfiable core [2021-05-06 00:14:05,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:14:06,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:14:06,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:14:06,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:14:06,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:14:06,864 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:14:06,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:14:06,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343753873] [2021-05-06 00:14:06,864 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:14:06,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748638785] [2021-05-06 00:14:06,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748638785] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:14:06,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:14:06,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2021-05-06 00:14:06,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519732521] [2021-05-06 00:14:06,864 INFO L460 AbstractCegarLoop]: Interpolant automaton has 64 states [2021-05-06 00:14:06,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:14:06,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-05-06 00:14:06,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=3907, Unknown=0, NotChecked=0, Total=4032 [2021-05-06 00:14:06,865 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand has 64 states, 64 states have (on average 1.0625) internal successors, (68), 64 states have internal predecessors, (68), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:14:09,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:14:09,755 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2021-05-06 00:14:09,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-05-06 00:14:09,756 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.0625) internal successors, (68), 64 states have internal predecessors, (68), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2021-05-06 00:14:09,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:14:09,756 INFO L225 Difference]: With dead ends: 76 [2021-05-06 00:14:09,756 INFO L226 Difference]: Without dead ends: 73 [2021-05-06 00:14:09,757 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1724.4ms TimeCoverageRelationStatistics Valid=129, Invalid=4031, Unknown=0, NotChecked=0, Total=4160 [2021-05-06 00:14:09,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-05-06 00:14:09,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-05-06 00:14:09,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 69 states have (on average 1.0144927536231885) internal successors, (70), 69 states have internal predecessors, (70), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:14:09,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2021-05-06 00:14:09,760 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 71 [2021-05-06 00:14:09,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:14:09,760 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2021-05-06 00:14:09,760 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 64 states, 64 states have (on average 1.0625) internal successors, (68), 64 states have internal predecessors, (68), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:14:09,760 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2021-05-06 00:14:09,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-06 00:14:09,761 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:14:09,761 INFO L523 BasicCegarLoop]: trace histogram [61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:14:09,976 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-05-06 00:14:09,977 INFO L428 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:14:09,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:14:09,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1993228565, now seen corresponding path program 61 times [2021-05-06 00:14:09,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:14:09,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99580823] [2021-05-06 00:14:09,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:14:09,983 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:14:09,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2047256366] [2021-05-06 00:14:09,983 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:14:10,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 00:14:10,064 WARN L261 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 252 conjunts are in the unsatisfiable core [2021-05-06 00:14:10,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:14:11,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:14:11,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:14:11,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:14:11,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:14:11,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:14:11,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:14:11,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99580823] [2021-05-06 00:14:11,882 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:14:11,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047256366] [2021-05-06 00:14:11,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047256366] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:14:11,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:14:11,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2021-05-06 00:14:11,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786146943] [2021-05-06 00:14:11,883 INFO L460 AbstractCegarLoop]: Interpolant automaton has 65 states [2021-05-06 00:14:11,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:14:11,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-05-06 00:14:11,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=4033, Unknown=0, NotChecked=0, Total=4160 [2021-05-06 00:14:11,883 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand has 65 states, 65 states have (on average 1.0615384615384615) internal successors, (69), 65 states have internal predecessors, (69), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:14:15,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:14:15,017 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2021-05-06 00:14:15,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-05-06 00:14:15,017 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.0615384615384615) internal successors, (69), 65 states have internal predecessors, (69), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2021-05-06 00:14:15,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:14:15,018 INFO L225 Difference]: With dead ends: 77 [2021-05-06 00:14:15,018 INFO L226 Difference]: Without dead ends: 74 [2021-05-06 00:14:15,018 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1745.5ms TimeCoverageRelationStatistics Valid=131, Invalid=4159, Unknown=0, NotChecked=0, Total=4290 [2021-05-06 00:14:15,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-05-06 00:14:15,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-05-06 00:14:15,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 70 states have (on average 1.0142857142857142) internal successors, (71), 70 states have internal predecessors, (71), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:14:15,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2021-05-06 00:14:15,023 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 72 [2021-05-06 00:14:15,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:14:15,023 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2021-05-06 00:14:15,023 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 65 states, 65 states have (on average 1.0615384615384615) internal successors, (69), 65 states have internal predecessors, (69), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:14:15,023 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2021-05-06 00:14:15,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-06 00:14:15,023 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:14:15,024 INFO L523 BasicCegarLoop]: trace histogram [62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:14:15,228 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:14:15,229 INFO L428 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:14:15,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:14:15,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1660605839, now seen corresponding path program 62 times [2021-05-06 00:14:15,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:14:15,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593401554] [2021-05-06 00:14:15,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:14:15,235 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:14:15,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [891457978] [2021-05-06 00:14:15,235 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:14:15,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 00:14:15,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:14:15,363 WARN L261 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 256 conjunts are in the unsatisfiable core [2021-05-06 00:14:15,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:14:17,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:14:17,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:14:17,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:14:17,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:14:17,292 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:14:17,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:14:17,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593401554] [2021-05-06 00:14:17,292 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:14:17,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891457978] [2021-05-06 00:14:17,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891457978] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:14:17,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:14:17,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2021-05-06 00:14:17,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192472422] [2021-05-06 00:14:17,292 INFO L460 AbstractCegarLoop]: Interpolant automaton has 66 states [2021-05-06 00:14:17,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:14:17,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-05-06 00:14:17,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=4161, Unknown=0, NotChecked=0, Total=4290 [2021-05-06 00:14:17,293 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand has 66 states, 66 states have (on average 1.0606060606060606) internal successors, (70), 66 states have internal predecessors, (70), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:14:21,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:14:21,047 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2021-05-06 00:14:21,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-05-06 00:14:21,047 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.0606060606060606) internal successors, (70), 66 states have internal predecessors, (70), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2021-05-06 00:14:21,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:14:21,048 INFO L225 Difference]: With dead ends: 78 [2021-05-06 00:14:21,048 INFO L226 Difference]: Without dead ends: 75 [2021-05-06 00:14:21,048 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1849.8ms TimeCoverageRelationStatistics Valid=133, Invalid=4289, Unknown=0, NotChecked=0, Total=4422 [2021-05-06 00:14:21,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-05-06 00:14:21,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-05-06 00:14:21,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 71 states have (on average 1.0140845070422535) internal successors, (72), 71 states have internal predecessors, (72), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:14:21,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2021-05-06 00:14:21,057 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 73 [2021-05-06 00:14:21,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:14:21,057 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2021-05-06 00:14:21,057 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 66 states, 66 states have (on average 1.0606060606060606) internal successors, (70), 66 states have internal predecessors, (70), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:14:21,057 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2021-05-06 00:14:21,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-06 00:14:21,058 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:14:21,058 INFO L523 BasicCegarLoop]: trace histogram [63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:14:21,274 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:14:21,274 INFO L428 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:14:21,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:14:21,274 INFO L82 PathProgramCache]: Analyzing trace with hash 60764075, now seen corresponding path program 63 times [2021-05-06 00:14:21,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:14:21,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783826432] [2021-05-06 00:14:21,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:14:21,286 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:14:21,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [309064085] [2021-05-06 00:14:21,287 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:14:21,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2021-05-06 00:14:21,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:14:21,441 WARN L261 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 260 conjunts are in the unsatisfiable core [2021-05-06 00:14:21,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:14:23,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:14:23,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:14:23,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:14:23,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:14:23,534 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:14:23,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:14:23,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783826432] [2021-05-06 00:14:23,535 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:14:23,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309064085] [2021-05-06 00:14:23,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309064085] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:14:23,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:14:23,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2021-05-06 00:14:23,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301650219] [2021-05-06 00:14:23,535 INFO L460 AbstractCegarLoop]: Interpolant automaton has 67 states [2021-05-06 00:14:23,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:14:23,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-05-06 00:14:23,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=4291, Unknown=0, NotChecked=0, Total=4422 [2021-05-06 00:14:23,536 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand has 67 states, 67 states have (on average 1.0597014925373134) internal successors, (71), 67 states have internal predecessors, (71), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:14:27,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:14:27,767 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2021-05-06 00:14:27,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-05-06 00:14:27,767 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.0597014925373134) internal successors, (71), 67 states have internal predecessors, (71), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2021-05-06 00:14:27,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:14:27,768 INFO L225 Difference]: With dead ends: 79 [2021-05-06 00:14:27,768 INFO L226 Difference]: Without dead ends: 76 [2021-05-06 00:14:27,768 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2009.9ms TimeCoverageRelationStatistics Valid=135, Invalid=4421, Unknown=0, NotChecked=0, Total=4556 [2021-05-06 00:14:27,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-05-06 00:14:27,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2021-05-06 00:14:27,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 72 states have (on average 1.0138888888888888) internal successors, (73), 72 states have internal predecessors, (73), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:14:27,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2021-05-06 00:14:27,772 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 74 [2021-05-06 00:14:27,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:14:27,772 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2021-05-06 00:14:27,772 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 67 states, 67 states have (on average 1.0597014925373134) internal successors, (71), 67 states have internal predecessors, (71), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:14:27,772 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2021-05-06 00:14:27,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-06 00:14:27,773 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:14:27,773 INFO L523 BasicCegarLoop]: trace histogram [64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:14:27,989 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:14:27,990 INFO L428 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:14:27,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:14:27,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1883623857, now seen corresponding path program 64 times [2021-05-06 00:14:27,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:14:27,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41710543] [2021-05-06 00:14:27,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:14:27,996 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:14:27,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1441057185] [2021-05-06 00:14:27,996 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:14:28,145 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 00:14:28,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:14:28,204 WARN L261 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 264 conjunts are in the unsatisfiable core [2021-05-06 00:14:28,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:14:30,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:14:30,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:14:30,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:14:30,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:14:30,410 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:14:30,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:14:30,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41710543] [2021-05-06 00:14:30,411 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:14:30,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441057185] [2021-05-06 00:14:30,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441057185] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:14:30,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:14:30,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2021-05-06 00:14:30,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650579134] [2021-05-06 00:14:30,411 INFO L460 AbstractCegarLoop]: Interpolant automaton has 68 states [2021-05-06 00:14:30,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:14:30,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-05-06 00:14:30,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=4423, Unknown=0, NotChecked=0, Total=4556 [2021-05-06 00:14:30,412 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand has 68 states, 68 states have (on average 1.0588235294117647) internal successors, (72), 68 states have internal predecessors, (72), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:14:34,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:14:34,738 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2021-05-06 00:14:34,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-05-06 00:14:34,739 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.0588235294117647) internal successors, (72), 68 states have internal predecessors, (72), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2021-05-06 00:14:34,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:14:34,739 INFO L225 Difference]: With dead ends: 80 [2021-05-06 00:14:34,739 INFO L226 Difference]: Without dead ends: 77 [2021-05-06 00:14:34,739 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2113.5ms TimeCoverageRelationStatistics Valid=137, Invalid=4555, Unknown=0, NotChecked=0, Total=4692 [2021-05-06 00:14:34,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-05-06 00:14:34,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2021-05-06 00:14:34,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 73 states have (on average 1.0136986301369864) internal successors, (74), 73 states have internal predecessors, (74), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:14:34,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2021-05-06 00:14:34,743 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 75 [2021-05-06 00:14:34,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:14:34,743 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2021-05-06 00:14:34,743 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 68 states, 68 states have (on average 1.0588235294117647) internal successors, (72), 68 states have internal predecessors, (72), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:14:34,743 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2021-05-06 00:14:34,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-05-06 00:14:34,743 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:14:34,743 INFO L523 BasicCegarLoop]: trace histogram [65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:14:34,944 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2021-05-06 00:14:34,944 INFO L428 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:14:34,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:14:34,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1737265045, now seen corresponding path program 65 times [2021-05-06 00:14:34,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:14:34,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660208766] [2021-05-06 00:14:34,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:14:34,951 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:14:34,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [278967268] [2021-05-06 00:14:34,951 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:14:35,053 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2021-05-06 00:14:35,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:14:35,057 WARN L261 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 268 conjunts are in the unsatisfiable core [2021-05-06 00:14:35,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:14:36,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:14:36,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:14:36,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:14:36,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:14:37,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:14:37,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:14:37,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660208766] [2021-05-06 00:14:37,043 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:14:37,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278967268] [2021-05-06 00:14:37,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278967268] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:14:37,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:14:37,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69] total 69 [2021-05-06 00:14:37,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574133] [2021-05-06 00:14:37,043 INFO L460 AbstractCegarLoop]: Interpolant automaton has 69 states [2021-05-06 00:14:37,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:14:37,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-05-06 00:14:37,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=4557, Unknown=0, NotChecked=0, Total=4692 [2021-05-06 00:14:37,044 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand has 69 states, 69 states have (on average 1.0579710144927537) internal successors, (73), 69 states have internal predecessors, (73), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:14:40,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:14:40,937 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2021-05-06 00:14:40,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-05-06 00:14:40,937 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.0579710144927537) internal successors, (73), 69 states have internal predecessors, (73), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2021-05-06 00:14:40,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:14:40,938 INFO L225 Difference]: With dead ends: 81 [2021-05-06 00:14:40,938 INFO L226 Difference]: Without dead ends: 78 [2021-05-06 00:14:40,938 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1906.1ms TimeCoverageRelationStatistics Valid=139, Invalid=4691, Unknown=0, NotChecked=0, Total=4830 [2021-05-06 00:14:40,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-05-06 00:14:40,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-05-06 00:14:40,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 74 states have (on average 1.0135135135135136) internal successors, (75), 74 states have internal predecessors, (75), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:14:40,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2021-05-06 00:14:40,941 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 76 [2021-05-06 00:14:40,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:14:40,942 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2021-05-06 00:14:40,942 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 69 states, 69 states have (on average 1.0579710144927537) internal successors, (73), 69 states have internal predecessors, (73), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:14:40,942 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2021-05-06 00:14:40,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-05-06 00:14:40,942 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:14:40,942 INFO L523 BasicCegarLoop]: trace histogram [66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:14:41,142 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:14:41,142 INFO L428 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:14:41,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:14:41,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1979295985, now seen corresponding path program 66 times [2021-05-06 00:14:41,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:14:41,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773427427] [2021-05-06 00:14:41,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:14:41,148 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:14:41,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [61558529] [2021-05-06 00:14:41,148 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:14:41,250 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2021-05-06 00:14:41,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:14:41,253 WARN L261 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 272 conjunts are in the unsatisfiable core [2021-05-06 00:14:41,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:14:43,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:14:43,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:14:43,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:14:43,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:14:43,527 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:14:43,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:14:43,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773427427] [2021-05-06 00:14:43,527 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:14:43,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61558529] [2021-05-06 00:14:43,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61558529] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:14:43,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:14:43,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2021-05-06 00:14:43,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472084417] [2021-05-06 00:14:43,528 INFO L460 AbstractCegarLoop]: Interpolant automaton has 70 states [2021-05-06 00:14:43,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:14:43,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-05-06 00:14:43,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=4693, Unknown=0, NotChecked=0, Total=4830 [2021-05-06 00:14:43,528 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand has 70 states, 70 states have (on average 1.0571428571428572) internal successors, (74), 70 states have internal predecessors, (74), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:14:48,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:14:48,105 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2021-05-06 00:14:48,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-05-06 00:14:48,106 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 1.0571428571428572) internal successors, (74), 70 states have internal predecessors, (74), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 77 [2021-05-06 00:14:48,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:14:48,106 INFO L225 Difference]: With dead ends: 82 [2021-05-06 00:14:48,106 INFO L226 Difference]: Without dead ends: 79 [2021-05-06 00:14:48,107 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2176.3ms TimeCoverageRelationStatistics Valid=141, Invalid=4829, Unknown=0, NotChecked=0, Total=4970 [2021-05-06 00:14:48,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-05-06 00:14:48,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2021-05-06 00:14:48,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 75 states have (on average 1.0133333333333334) internal successors, (76), 75 states have internal predecessors, (76), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:14:48,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2021-05-06 00:14:48,112 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 77 [2021-05-06 00:14:48,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:14:48,112 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2021-05-06 00:14:48,112 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 70 states, 70 states have (on average 1.0571428571428572) internal successors, (74), 70 states have internal predecessors, (74), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:14:48,112 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2021-05-06 00:14:48,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-05-06 00:14:48,113 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:14:48,113 INFO L523 BasicCegarLoop]: trace histogram [67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:14:48,313 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:14:48,313 INFO L428 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:14:48,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:14:48,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1228570923, now seen corresponding path program 67 times [2021-05-06 00:14:48,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:14:48,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70709782] [2021-05-06 00:14:48,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:14:48,321 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:14:48,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1172039061] [2021-05-06 00:14:48,322 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:14:48,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 00:14:48,434 WARN L261 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 276 conjunts are in the unsatisfiable core [2021-05-06 00:14:48,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:14:50,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:14:50,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:14:50,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:14:50,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:14:50,853 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:14:50,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:14:50,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70709782] [2021-05-06 00:14:50,853 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:14:50,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172039061] [2021-05-06 00:14:50,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172039061] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:14:50,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:14:50,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71] total 71 [2021-05-06 00:14:50,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597493767] [2021-05-06 00:14:50,854 INFO L460 AbstractCegarLoop]: Interpolant automaton has 71 states [2021-05-06 00:14:50,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:14:50,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-05-06 00:14:50,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=4831, Unknown=0, NotChecked=0, Total=4970 [2021-05-06 00:14:50,854 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand has 71 states, 71 states have (on average 1.056338028169014) internal successors, (75), 71 states have internal predecessors, (75), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:14:55,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:14:55,694 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2021-05-06 00:14:55,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-05-06 00:14:55,694 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.056338028169014) internal successors, (75), 71 states have internal predecessors, (75), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2021-05-06 00:14:55,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:14:55,695 INFO L225 Difference]: With dead ends: 83 [2021-05-06 00:14:55,695 INFO L226 Difference]: Without dead ends: 80 [2021-05-06 00:14:55,695 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2302.1ms TimeCoverageRelationStatistics Valid=143, Invalid=4969, Unknown=0, NotChecked=0, Total=5112 [2021-05-06 00:14:55,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-05-06 00:14:55,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-05-06 00:14:55,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 76 states have (on average 1.013157894736842) internal successors, (77), 76 states have internal predecessors, (77), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:14:55,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2021-05-06 00:14:55,699 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 78 [2021-05-06 00:14:55,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:14:55,699 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2021-05-06 00:14:55,699 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 71 states, 71 states have (on average 1.056338028169014) internal successors, (75), 71 states have internal predecessors, (75), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:14:55,699 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2021-05-06 00:14:55,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-06 00:14:55,699 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:14:55,699 INFO L523 BasicCegarLoop]: trace histogram [68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:14:55,915 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-05-06 00:14:55,915 INFO L428 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:14:55,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:14:55,916 INFO L82 PathProgramCache]: Analyzing trace with hash -569069519, now seen corresponding path program 68 times [2021-05-06 00:14:55,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:14:55,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849752692] [2021-05-06 00:14:55,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:14:55,926 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:14:55,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1443501789] [2021-05-06 00:14:55,926 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:14:56,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 00:14:56,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:14:56,030 WARN L261 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 280 conjunts are in the unsatisfiable core [2021-05-06 00:14:56,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:14:58,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:14:58,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:14:58,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:14:58,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:14:58,498 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:14:58,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:14:58,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849752692] [2021-05-06 00:14:58,498 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:14:58,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443501789] [2021-05-06 00:14:58,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443501789] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:14:58,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:14:58,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2021-05-06 00:14:58,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263010523] [2021-05-06 00:14:58,499 INFO L460 AbstractCegarLoop]: Interpolant automaton has 72 states [2021-05-06 00:14:58,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:14:58,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-05-06 00:14:58,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=4971, Unknown=0, NotChecked=0, Total=5112 [2021-05-06 00:14:58,499 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand has 72 states, 72 states have (on average 1.0555555555555556) internal successors, (76), 72 states have internal predecessors, (76), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:15:03,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:15:03,832 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2021-05-06 00:15:03,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-05-06 00:15:03,832 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.0555555555555556) internal successors, (76), 72 states have internal predecessors, (76), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 79 [2021-05-06 00:15:03,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:15:03,833 INFO L225 Difference]: With dead ends: 84 [2021-05-06 00:15:03,833 INFO L226 Difference]: Without dead ends: 81 [2021-05-06 00:15:03,833 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2357.3ms TimeCoverageRelationStatistics Valid=145, Invalid=5111, Unknown=0, NotChecked=0, Total=5256 [2021-05-06 00:15:03,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-05-06 00:15:03,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-05-06 00:15:03,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 77 states have (on average 1.0129870129870129) internal successors, (78), 77 states have internal predecessors, (78), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:15:03,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2021-05-06 00:15:03,837 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 79 [2021-05-06 00:15:03,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:15:03,837 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2021-05-06 00:15:03,837 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 72 states, 72 states have (on average 1.0555555555555556) internal successors, (76), 72 states have internal predecessors, (76), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:15:03,837 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2021-05-06 00:15:03,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-06 00:15:03,837 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:15:03,837 INFO L523 BasicCegarLoop]: trace histogram [69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:15:04,052 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-05-06 00:15:04,053 INFO L428 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:15:04,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:15:04,053 INFO L82 PathProgramCache]: Analyzing trace with hash -461348373, now seen corresponding path program 69 times [2021-05-06 00:15:04,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:15:04,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680085776] [2021-05-06 00:15:04,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:15:04,059 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:15:04,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [583992672] [2021-05-06 00:15:04,059 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:15:04,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2021-05-06 00:15:04,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:15:04,171 WARN L261 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 285 conjunts are in the unsatisfiable core [2021-05-06 00:15:04,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:15:06,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:15:06,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:15:06,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:15:06,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:15:06,751 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:15:06,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:15:06,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680085776] [2021-05-06 00:15:06,752 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:15:06,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583992672] [2021-05-06 00:15:06,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583992672] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:15:06,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:15:06,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74] total 74 [2021-05-06 00:15:06,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709519987] [2021-05-06 00:15:06,752 INFO L460 AbstractCegarLoop]: Interpolant automaton has 74 states [2021-05-06 00:15:06,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:15:06,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-05-06 00:15:06,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=5187, Unknown=0, NotChecked=0, Total=5402 [2021-05-06 00:15:06,752 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand has 74 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 74 states have internal predecessors, (77), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:15:12,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:15:12,729 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2021-05-06 00:15:12,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-05-06 00:15:12,729 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 74 states have internal predecessors, (77), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2021-05-06 00:15:12,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:15:12,729 INFO L225 Difference]: With dead ends: 85 [2021-05-06 00:15:12,729 INFO L226 Difference]: Without dead ends: 82 [2021-05-06 00:15:12,730 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 2473.2ms TimeCoverageRelationStatistics Valid=220, Invalid=5330, Unknown=0, NotChecked=0, Total=5550 [2021-05-06 00:15:12,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-05-06 00:15:12,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2021-05-06 00:15:12,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 78 states have (on average 1.0128205128205128) internal successors, (79), 78 states have internal predecessors, (79), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:15:12,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2021-05-06 00:15:12,733 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 80 [2021-05-06 00:15:12,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:15:12,734 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2021-05-06 00:15:12,734 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 74 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 74 states have internal predecessors, (77), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:15:12,734 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2021-05-06 00:15:12,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-05-06 00:15:12,734 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:15:12,734 INFO L523 BasicCegarLoop]: trace histogram [70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:15:12,934 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2021-05-06 00:15:12,934 INFO L428 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:15:12,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:15:12,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1416960143, now seen corresponding path program 70 times [2021-05-06 00:15:12,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:15:12,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78416721] [2021-05-06 00:15:12,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:15:12,940 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:15:12,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1666314076] [2021-05-06 00:15:12,940 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:15:13,060 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 00:15:13,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:15:13,064 WARN L261 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 288 conjunts are in the unsatisfiable core [2021-05-06 00:15:13,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:15:15,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:15:15,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:15:15,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:15:15,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:15:15,426 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:15:15,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:15:15,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78416721] [2021-05-06 00:15:15,426 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:15:15,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666314076] [2021-05-06 00:15:15,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666314076] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:15:15,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:15:15,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74] total 74 [2021-05-06 00:15:15,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960709997] [2021-05-06 00:15:15,427 INFO L460 AbstractCegarLoop]: Interpolant automaton has 74 states [2021-05-06 00:15:15,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:15:15,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-05-06 00:15:15,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=5257, Unknown=0, NotChecked=0, Total=5402 [2021-05-06 00:15:15,427 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand has 74 states, 74 states have (on average 1.054054054054054) internal successors, (78), 74 states have internal predecessors, (78), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:15:21,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:15:21,842 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2021-05-06 00:15:21,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-05-06 00:15:21,842 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.054054054054054) internal successors, (78), 74 states have internal predecessors, (78), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 81 [2021-05-06 00:15:21,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:15:21,843 INFO L225 Difference]: With dead ends: 86 [2021-05-06 00:15:21,843 INFO L226 Difference]: Without dead ends: 83 [2021-05-06 00:15:21,843 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2272.7ms TimeCoverageRelationStatistics Valid=149, Invalid=5401, Unknown=0, NotChecked=0, Total=5550 [2021-05-06 00:15:21,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-05-06 00:15:21,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-05-06 00:15:21,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 79 states have (on average 1.0126582278481013) internal successors, (80), 79 states have internal predecessors, (80), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:15:21,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2021-05-06 00:15:21,847 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 81 [2021-05-06 00:15:21,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:15:21,847 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2021-05-06 00:15:21,847 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 74 states, 74 states have (on average 1.054054054054054) internal successors, (78), 74 states have internal predecessors, (78), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:15:21,847 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2021-05-06 00:15:21,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-05-06 00:15:21,847 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:15:21,847 INFO L523 BasicCegarLoop]: trace histogram [71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:15:22,052 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:15:22,053 INFO L428 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:15:22,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:15:22,053 INFO L82 PathProgramCache]: Analyzing trace with hash -976153941, now seen corresponding path program 71 times [2021-05-06 00:15:22,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:15:22,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340604889] [2021-05-06 00:15:22,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:15:22,059 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:15:22,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [128911185] [2021-05-06 00:15:22,059 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:15:22,168 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2021-05-06 00:15:22,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:15:22,172 WARN L261 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 292 conjunts are in the unsatisfiable core [2021-05-06 00:15:22,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:15:24,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:15:24,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:15:24,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:15:24,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:15:24,697 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:15:24,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:15:24,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340604889] [2021-05-06 00:15:24,697 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:15:24,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128911185] [2021-05-06 00:15:24,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128911185] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:15:24,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:15:24,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75] total 75 [2021-05-06 00:15:24,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543164346] [2021-05-06 00:15:24,698 INFO L460 AbstractCegarLoop]: Interpolant automaton has 75 states [2021-05-06 00:15:24,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:15:24,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-05-06 00:15:24,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=5403, Unknown=0, NotChecked=0, Total=5550 [2021-05-06 00:15:24,698 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand has 75 states, 75 states have (on average 1.0533333333333332) internal successors, (79), 75 states have internal predecessors, (79), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:15:31,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:15:31,316 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2021-05-06 00:15:31,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-05-06 00:15:31,317 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.0533333333333332) internal successors, (79), 75 states have internal predecessors, (79), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 82 [2021-05-06 00:15:31,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:15:31,317 INFO L225 Difference]: With dead ends: 87 [2021-05-06 00:15:31,317 INFO L226 Difference]: Without dead ends: 84 [2021-05-06 00:15:31,317 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2439.5ms TimeCoverageRelationStatistics Valid=151, Invalid=5549, Unknown=0, NotChecked=0, Total=5700 [2021-05-06 00:15:31,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-05-06 00:15:31,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-05-06 00:15:31,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 80 states have (on average 1.0125) internal successors, (81), 80 states have internal predecessors, (81), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:15:31,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2021-05-06 00:15:31,321 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 82 [2021-05-06 00:15:31,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:15:31,321 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2021-05-06 00:15:31,321 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 75 states, 75 states have (on average 1.0533333333333332) internal successors, (79), 75 states have internal predecessors, (79), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:15:31,321 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2021-05-06 00:15:31,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-05-06 00:15:31,321 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:15:31,322 INFO L523 BasicCegarLoop]: trace histogram [72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:15:31,522 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-05-06 00:15:31,522 INFO L428 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:15:31,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:15:31,522 INFO L82 PathProgramCache]: Analyzing trace with hash -196063567, now seen corresponding path program 72 times [2021-05-06 00:15:31,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:15:31,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24586634] [2021-05-06 00:15:31,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:15:31,528 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:15:31,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1338308799] [2021-05-06 00:15:31,528 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:15:31,633 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2021-05-06 00:15:31,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:15:31,637 WARN L261 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 296 conjunts are in the unsatisfiable core [2021-05-06 00:15:31,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:15:34,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:15:34,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:15:34,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:15:34,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:15:34,288 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:15:34,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:15:34,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24586634] [2021-05-06 00:15:34,289 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:15:34,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338308799] [2021-05-06 00:15:34,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338308799] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:15:34,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:15:34,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76] total 76 [2021-05-06 00:15:34,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775955784] [2021-05-06 00:15:34,289 INFO L460 AbstractCegarLoop]: Interpolant automaton has 76 states [2021-05-06 00:15:34,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:15:34,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-05-06 00:15:34,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=5551, Unknown=0, NotChecked=0, Total=5700 [2021-05-06 00:15:34,290 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand has 76 states, 76 states have (on average 1.0526315789473684) internal successors, (80), 76 states have internal predecessors, (80), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:15:42,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:15:42,791 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2021-05-06 00:15:42,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-05-06 00:15:42,791 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 1.0526315789473684) internal successors, (80), 76 states have internal predecessors, (80), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2021-05-06 00:15:42,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:15:42,792 INFO L225 Difference]: With dead ends: 88 [2021-05-06 00:15:42,792 INFO L226 Difference]: Without dead ends: 85 [2021-05-06 00:15:42,792 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2562.0ms TimeCoverageRelationStatistics Valid=153, Invalid=5699, Unknown=0, NotChecked=0, Total=5852 [2021-05-06 00:15:42,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-05-06 00:15:42,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2021-05-06 00:15:42,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 81 states have (on average 1.0123456790123457) internal successors, (82), 81 states have internal predecessors, (82), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:15:42,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2021-05-06 00:15:42,796 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 83 [2021-05-06 00:15:42,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:15:42,796 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2021-05-06 00:15:42,796 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 76 states, 76 states have (on average 1.0526315789473684) internal successors, (80), 76 states have internal predecessors, (80), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:15:42,796 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2021-05-06 00:15:42,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-05-06 00:15:42,796 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:15:42,796 INFO L523 BasicCegarLoop]: trace histogram [73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:15:43,000 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:15:43,001 INFO L428 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:15:43,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:15:43,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1783065749, now seen corresponding path program 73 times [2021-05-06 00:15:43,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:15:43,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538496750] [2021-05-06 00:15:43,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:15:43,007 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:15:43,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [437945008] [2021-05-06 00:15:43,007 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:15:43,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 00:15:43,092 WARN L261 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 300 conjunts are in the unsatisfiable core [2021-05-06 00:15:43,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:15:45,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:15:45,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:15:45,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:15:45,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:15:45,711 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:15:45,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:15:45,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538496750] [2021-05-06 00:15:45,712 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:15:45,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437945008] [2021-05-06 00:15:45,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437945008] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:15:45,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:15:45,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77] total 77 [2021-05-06 00:15:45,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395506225] [2021-05-06 00:15:45,712 INFO L460 AbstractCegarLoop]: Interpolant automaton has 77 states [2021-05-06 00:15:45,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:15:45,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-05-06 00:15:45,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=5701, Unknown=0, NotChecked=0, Total=5852 [2021-05-06 00:15:45,713 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand has 77 states, 77 states have (on average 1.051948051948052) internal successors, (81), 77 states have internal predecessors, (81), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:15:54,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:15:54,970 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2021-05-06 00:15:54,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-05-06 00:15:54,971 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 1.051948051948052) internal successors, (81), 77 states have internal predecessors, (81), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 84 [2021-05-06 00:15:54,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:15:54,971 INFO L225 Difference]: With dead ends: 89 [2021-05-06 00:15:54,971 INFO L226 Difference]: Without dead ends: 86 [2021-05-06 00:15:54,971 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2523.9ms TimeCoverageRelationStatistics Valid=155, Invalid=5851, Unknown=0, NotChecked=0, Total=6006 [2021-05-06 00:15:54,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-05-06 00:15:54,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2021-05-06 00:15:54,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 82 states have (on average 1.0121951219512195) internal successors, (83), 82 states have internal predecessors, (83), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:15:54,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2021-05-06 00:15:54,975 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 84 [2021-05-06 00:15:54,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:15:54,975 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2021-05-06 00:15:54,976 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 77 states, 77 states have (on average 1.051948051948052) internal successors, (81), 77 states have internal predecessors, (81), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:15:54,976 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2021-05-06 00:15:54,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-06 00:15:54,976 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:15:54,976 INFO L523 BasicCegarLoop]: trace histogram [74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:15:55,179 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2021-05-06 00:15:55,179 INFO L428 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:15:55,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:15:55,180 INFO L82 PathProgramCache]: Analyzing trace with hash 559474161, now seen corresponding path program 74 times [2021-05-06 00:15:55,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:15:55,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367059974] [2021-05-06 00:15:55,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:15:55,186 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:15:55,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1182471999] [2021-05-06 00:15:55,186 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:15:55,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 00:15:55,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:15:55,307 WARN L261 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 304 conjunts are in the unsatisfiable core [2021-05-06 00:15:55,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:15:57,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:15:57,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:15:57,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:15:57,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:15:58,060 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:15:58,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:15:58,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367059974] [2021-05-06 00:15:58,060 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:15:58,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182471999] [2021-05-06 00:15:58,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182471999] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:15:58,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:15:58,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78] total 78 [2021-05-06 00:15:58,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431779618] [2021-05-06 00:15:58,060 INFO L460 AbstractCegarLoop]: Interpolant automaton has 78 states [2021-05-06 00:15:58,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:15:58,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-05-06 00:15:58,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=5853, Unknown=0, NotChecked=0, Total=6006 [2021-05-06 00:15:58,061 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand has 78 states, 78 states have (on average 1.0512820512820513) internal successors, (82), 78 states have internal predecessors, (82), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:16:07,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:16:07,935 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2021-05-06 00:16:07,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-05-06 00:16:07,935 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 1.0512820512820513) internal successors, (82), 78 states have internal predecessors, (82), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 85 [2021-05-06 00:16:07,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:16:07,935 INFO L225 Difference]: With dead ends: 90 [2021-05-06 00:16:07,936 INFO L226 Difference]: Without dead ends: 87 [2021-05-06 00:16:07,936 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2647.0ms TimeCoverageRelationStatistics Valid=157, Invalid=6005, Unknown=0, NotChecked=0, Total=6162 [2021-05-06 00:16:07,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-05-06 00:16:07,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2021-05-06 00:16:07,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 83 states have (on average 1.0120481927710843) internal successors, (84), 83 states have internal predecessors, (84), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:16:07,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2021-05-06 00:16:07,940 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 85 [2021-05-06 00:16:07,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:16:07,940 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2021-05-06 00:16:07,940 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 78 states, 78 states have (on average 1.0512820512820513) internal successors, (82), 78 states have internal predecessors, (82), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:16:07,940 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2021-05-06 00:16:07,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-06 00:16:07,940 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:16:07,940 INFO L523 BasicCegarLoop]: trace histogram [75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:16:08,141 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:16:08,141 INFO L428 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:16:08,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:16:08,141 INFO L82 PathProgramCache]: Analyzing trace with hash 163767339, now seen corresponding path program 75 times [2021-05-06 00:16:08,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:16:08,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129678919] [2021-05-06 00:16:08,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:16:08,147 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:16:08,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1569109997] [2021-05-06 00:16:08,147 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:16:08,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2021-05-06 00:16:08,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:16:08,268 WARN L261 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 309 conjunts are in the unsatisfiable core [2021-05-06 00:16:08,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:16:11,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:16:11,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:16:11,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:16:11,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:16:11,287 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:16:11,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:16:11,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129678919] [2021-05-06 00:16:11,288 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:16:11,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569109997] [2021-05-06 00:16:11,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569109997] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:16:11,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:16:11,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80] total 80 [2021-05-06 00:16:11,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156740169] [2021-05-06 00:16:11,288 INFO L460 AbstractCegarLoop]: Interpolant automaton has 80 states [2021-05-06 00:16:11,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:16:11,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-05-06 00:16:11,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=6087, Unknown=0, NotChecked=0, Total=6320 [2021-05-06 00:16:11,289 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand has 80 states, 80 states have (on average 1.0375) internal successors, (83), 80 states have internal predecessors, (83), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:16:21,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:16:21,642 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2021-05-06 00:16:21,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-05-06 00:16:21,643 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.0375) internal successors, (83), 80 states have internal predecessors, (83), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 86 [2021-05-06 00:16:21,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:16:21,643 INFO L225 Difference]: With dead ends: 91 [2021-05-06 00:16:21,643 INFO L226 Difference]: Without dead ends: 88 [2021-05-06 00:16:21,643 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 2906.4ms TimeCoverageRelationStatistics Valid=238, Invalid=6242, Unknown=0, NotChecked=0, Total=6480 [2021-05-06 00:16:21,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-05-06 00:16:21,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2021-05-06 00:16:21,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 84 states have (on average 1.0119047619047619) internal successors, (85), 84 states have internal predecessors, (85), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:16:21,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2021-05-06 00:16:21,647 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 86 [2021-05-06 00:16:21,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:16:21,647 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2021-05-06 00:16:21,647 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 80 states, 80 states have (on average 1.0375) internal successors, (83), 80 states have internal predecessors, (83), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:16:21,647 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2021-05-06 00:16:21,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-06 00:16:21,648 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:16:21,648 INFO L523 BasicCegarLoop]: trace histogram [76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:16:21,864 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2021-05-06 00:16:21,864 INFO L428 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:16:21,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:16:21,864 INFO L82 PathProgramCache]: Analyzing trace with hash 781757745, now seen corresponding path program 76 times [2021-05-06 00:16:21,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:16:21,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87740446] [2021-05-06 00:16:21,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:16:21,870 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:16:21,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [972948722] [2021-05-06 00:16:21,870 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:16:21,959 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 00:16:21,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:16:21,965 WARN L261 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 312 conjunts are in the unsatisfiable core [2021-05-06 00:16:21,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:16:24,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:16:24,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:16:24,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:16:24,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:16:24,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:16:24,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:16:24,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87740446] [2021-05-06 00:16:24,710 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:16:24,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972948722] [2021-05-06 00:16:24,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972948722] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:16:24,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:16:24,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80] total 80 [2021-05-06 00:16:24,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104995114] [2021-05-06 00:16:24,710 INFO L460 AbstractCegarLoop]: Interpolant automaton has 80 states [2021-05-06 00:16:24,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:16:24,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-05-06 00:16:24,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=6163, Unknown=0, NotChecked=0, Total=6320 [2021-05-06 00:16:24,711 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand has 80 states, 80 states have (on average 1.05) internal successors, (84), 80 states have internal predecessors, (84), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:16:35,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:16:35,136 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2021-05-06 00:16:35,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-05-06 00:16:35,136 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.05) internal successors, (84), 80 states have internal predecessors, (84), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 87 [2021-05-06 00:16:35,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:16:35,137 INFO L225 Difference]: With dead ends: 92 [2021-05-06 00:16:35,137 INFO L226 Difference]: Without dead ends: 89 [2021-05-06 00:16:35,137 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2653.2ms TimeCoverageRelationStatistics Valid=161, Invalid=6319, Unknown=0, NotChecked=0, Total=6480 [2021-05-06 00:16:35,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-05-06 00:16:35,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-05-06 00:16:35,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 85 states have (on average 1.011764705882353) internal successors, (86), 85 states have internal predecessors, (86), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:16:35,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2021-05-06 00:16:35,141 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 87 [2021-05-06 00:16:35,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:16:35,141 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2021-05-06 00:16:35,141 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 80 states, 80 states have (on average 1.05) internal successors, (84), 80 states have internal predecessors, (84), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:16:35,141 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2021-05-06 00:16:35,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-05-06 00:16:35,142 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:16:35,142 INFO L523 BasicCegarLoop]: trace histogram [77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:16:35,344 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable226 [2021-05-06 00:16:35,345 INFO L428 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:16:35,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:16:35,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1535376149, now seen corresponding path program 77 times [2021-05-06 00:16:35,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:16:35,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058791147] [2021-05-06 00:16:35,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:16:35,355 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:16:35,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [887804618] [2021-05-06 00:16:35,355 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:16:35,497 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2021-05-06 00:16:35,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:16:35,502 WARN L261 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 316 conjunts are in the unsatisfiable core [2021-05-06 00:16:35,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:16:38,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:16:38,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:16:38,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:16:38,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:16:38,433 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:16:38,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:16:38,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058791147] [2021-05-06 00:16:38,434 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:16:38,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887804618] [2021-05-06 00:16:38,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887804618] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:16:38,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:16:38,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81] total 81 [2021-05-06 00:16:38,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667210583] [2021-05-06 00:16:38,434 INFO L460 AbstractCegarLoop]: Interpolant automaton has 81 states [2021-05-06 00:16:38,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:16:38,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-05-06 00:16:38,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=6321, Unknown=0, NotChecked=0, Total=6480 [2021-05-06 00:16:38,435 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand has 81 states, 81 states have (on average 1.0493827160493827) internal successors, (85), 81 states have internal predecessors, (85), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:16:50,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:16:50,053 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2021-05-06 00:16:50,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-05-06 00:16:50,054 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 1.0493827160493827) internal successors, (85), 81 states have internal predecessors, (85), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 88 [2021-05-06 00:16:50,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:16:50,054 INFO L225 Difference]: With dead ends: 93 [2021-05-06 00:16:50,054 INFO L226 Difference]: Without dead ends: 90 [2021-05-06 00:16:50,055 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2839.8ms TimeCoverageRelationStatistics Valid=163, Invalid=6479, Unknown=0, NotChecked=0, Total=6642 [2021-05-06 00:16:50,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-05-06 00:16:50,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2021-05-06 00:16:50,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 86 states have (on average 1.0116279069767442) internal successors, (87), 86 states have internal predecessors, (87), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:16:50,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2021-05-06 00:16:50,059 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 88 [2021-05-06 00:16:50,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:16:50,059 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2021-05-06 00:16:50,059 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 81 states, 81 states have (on average 1.0493827160493827) internal successors, (85), 81 states have internal predecessors, (85), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:16:50,059 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2021-05-06 00:16:50,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-06 00:16:50,059 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:16:50,059 INFO L523 BasicCegarLoop]: trace histogram [78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:16:50,259 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:16:50,260 INFO L428 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:16:50,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:16:50,260 INFO L82 PathProgramCache]: Analyzing trace with hash -352082831, now seen corresponding path program 78 times [2021-05-06 00:16:50,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:16:50,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968348870] [2021-05-06 00:16:50,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:16:50,266 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:16:50,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [702168230] [2021-05-06 00:16:50,266 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:16:50,390 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2021-05-06 00:16:50,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:16:50,395 WARN L261 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 320 conjunts are in the unsatisfiable core [2021-05-06 00:16:50,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:16:53,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:16:53,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:16:53,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:16:53,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:16:53,315 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:16:53,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:16:53,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968348870] [2021-05-06 00:16:53,315 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:16:53,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702168230] [2021-05-06 00:16:53,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702168230] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:16:53,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:16:53,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82] total 82 [2021-05-06 00:16:53,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118792168] [2021-05-06 00:16:53,316 INFO L460 AbstractCegarLoop]: Interpolant automaton has 82 states [2021-05-06 00:16:53,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:16:53,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-05-06 00:16:53,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=6481, Unknown=0, NotChecked=0, Total=6642 [2021-05-06 00:16:53,316 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand has 82 states, 82 states have (on average 1.048780487804878) internal successors, (86), 82 states have internal predecessors, (86), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:17:06,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:17:06,711 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2021-05-06 00:17:06,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-05-06 00:17:06,711 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 1.048780487804878) internal successors, (86), 82 states have internal predecessors, (86), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 89 [2021-05-06 00:17:06,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:17:06,712 INFO L225 Difference]: With dead ends: 94 [2021-05-06 00:17:06,712 INFO L226 Difference]: Without dead ends: 91 [2021-05-06 00:17:06,712 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2837.7ms TimeCoverageRelationStatistics Valid=165, Invalid=6641, Unknown=0, NotChecked=0, Total=6806 [2021-05-06 00:17:06,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-05-06 00:17:06,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2021-05-06 00:17:06,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 87 states have (on average 1.0114942528735633) internal successors, (88), 87 states have internal predecessors, (88), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:17:06,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2021-05-06 00:17:06,716 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 89 [2021-05-06 00:17:06,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:17:06,716 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2021-05-06 00:17:06,716 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 82 states, 82 states have (on average 1.048780487804878) internal successors, (86), 82 states have internal predecessors, (86), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:17:06,716 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2021-05-06 00:17:06,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-06 00:17:06,717 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:17:06,717 INFO L523 BasicCegarLoop]: trace histogram [79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:17:06,918 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable232,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:17:06,918 INFO L428 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:17:06,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:17:06,918 INFO L82 PathProgramCache]: Analyzing trace with hash 1970271659, now seen corresponding path program 79 times [2021-05-06 00:17:06,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:17:06,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112982528] [2021-05-06 00:17:06,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:17:06,924 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:17:06,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1072445318] [2021-05-06 00:17:06,924 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:17:07,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 00:17:07,013 WARN L261 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 324 conjunts are in the unsatisfiable core [2021-05-06 00:17:07,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:17:09,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:17:09,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:17:09,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:17:09,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:17:09,981 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:17:09,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:17:09,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112982528] [2021-05-06 00:17:09,982 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:17:09,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072445318] [2021-05-06 00:17:09,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072445318] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:17:09,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:17:09,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83] total 83 [2021-05-06 00:17:09,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823483080] [2021-05-06 00:17:09,982 INFO L460 AbstractCegarLoop]: Interpolant automaton has 83 states [2021-05-06 00:17:09,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:17:09,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-05-06 00:17:09,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=6643, Unknown=0, NotChecked=0, Total=6806 [2021-05-06 00:17:09,983 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand has 83 states, 83 states have (on average 1.0481927710843373) internal successors, (87), 83 states have internal predecessors, (87), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:17:25,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:17:25,190 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2021-05-06 00:17:25,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-05-06 00:17:25,191 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 1.0481927710843373) internal successors, (87), 83 states have internal predecessors, (87), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 90 [2021-05-06 00:17:25,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:17:25,191 INFO L225 Difference]: With dead ends: 95 [2021-05-06 00:17:25,191 INFO L226 Difference]: Without dead ends: 92 [2021-05-06 00:17:25,192 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2873.2ms TimeCoverageRelationStatistics Valid=167, Invalid=6805, Unknown=0, NotChecked=0, Total=6972 [2021-05-06 00:17:25,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-05-06 00:17:25,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2021-05-06 00:17:25,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 88 states have (on average 1.0113636363636365) internal successors, (89), 88 states have internal predecessors, (89), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:17:25,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2021-05-06 00:17:25,196 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 90 [2021-05-06 00:17:25,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:17:25,196 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2021-05-06 00:17:25,196 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 83 states, 83 states have (on average 1.0481927710843373) internal successors, (87), 83 states have internal predecessors, (87), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:17:25,196 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2021-05-06 00:17:25,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-05-06 00:17:25,196 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:17:25,196 INFO L523 BasicCegarLoop]: trace histogram [80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:17:25,412 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-05-06 00:17:25,413 INFO L428 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:17:25,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:17:25,413 INFO L82 PathProgramCache]: Analyzing trace with hash 948816817, now seen corresponding path program 80 times [2021-05-06 00:17:25,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:17:25,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975441928] [2021-05-06 00:17:25,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:17:25,419 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:17:25,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1336913852] [2021-05-06 00:17:25,419 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:17:25,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 00:17:25,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:17:25,542 WARN L261 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 328 conjunts are in the unsatisfiable core [2021-05-06 00:17:25,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:17:28,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:17:28,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:17:28,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:17:28,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:17:28,601 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:17:28,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:17:28,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975441928] [2021-05-06 00:17:28,601 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:17:28,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336913852] [2021-05-06 00:17:28,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336913852] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:17:28,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:17:28,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84] total 84 [2021-05-06 00:17:28,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368760030] [2021-05-06 00:17:28,602 INFO L460 AbstractCegarLoop]: Interpolant automaton has 84 states [2021-05-06 00:17:28,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:17:28,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-05-06 00:17:28,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=6807, Unknown=0, NotChecked=0, Total=6972 [2021-05-06 00:17:28,602 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand has 84 states, 84 states have (on average 1.0476190476190477) internal successors, (88), 84 states have internal predecessors, (88), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:17:45,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:17:45,751 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2021-05-06 00:17:45,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-05-06 00:17:45,751 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 1.0476190476190477) internal successors, (88), 84 states have internal predecessors, (88), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 91 [2021-05-06 00:17:45,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:17:45,752 INFO L225 Difference]: With dead ends: 96 [2021-05-06 00:17:45,752 INFO L226 Difference]: Without dead ends: 93 [2021-05-06 00:17:45,752 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2967.6ms TimeCoverageRelationStatistics Valid=169, Invalid=6971, Unknown=0, NotChecked=0, Total=7140 [2021-05-06 00:17:45,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-05-06 00:17:45,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2021-05-06 00:17:45,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 89 states have (on average 1.0112359550561798) internal successors, (90), 89 states have internal predecessors, (90), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:17:45,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2021-05-06 00:17:45,757 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 91 [2021-05-06 00:17:45,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:17:45,757 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2021-05-06 00:17:45,757 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 84 states, 84 states have (on average 1.0476190476190477) internal successors, (88), 84 states have internal predecessors, (88), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:17:45,757 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2021-05-06 00:17:45,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-06 00:17:45,757 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:17:45,757 INFO L523 BasicCegarLoop]: trace histogram [81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:17:45,958 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable238,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:17:45,958 INFO L428 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:17:45,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:17:45,958 INFO L82 PathProgramCache]: Analyzing trace with hash -651512213, now seen corresponding path program 81 times [2021-05-06 00:17:45,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:17:45,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811588294] [2021-05-06 00:17:45,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:17:45,964 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:17:45,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1639157927] [2021-05-06 00:17:45,964 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:17:46,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2021-05-06 00:17:46,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:17:46,144 WARN L261 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 332 conjunts are in the unsatisfiable core [2021-05-06 00:17:46,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:17:49,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:17:49,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:17:49,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:17:49,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:17:49,800 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:17:49,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:17:49,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811588294] [2021-05-06 00:17:49,800 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:17:49,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639157927] [2021-05-06 00:17:49,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639157927] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:17:49,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:17:49,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85] total 85 [2021-05-06 00:17:49,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694033965] [2021-05-06 00:17:49,800 INFO L460 AbstractCegarLoop]: Interpolant automaton has 85 states [2021-05-06 00:17:49,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:17:49,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-05-06 00:17:49,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=6973, Unknown=0, NotChecked=0, Total=7140 [2021-05-06 00:17:49,801 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand has 85 states, 85 states have (on average 1.0470588235294118) internal successors, (89), 85 states have internal predecessors, (89), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:18:07,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:18:07,079 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2021-05-06 00:18:07,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-05-06 00:18:07,079 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.0470588235294118) internal successors, (89), 85 states have internal predecessors, (89), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 92 [2021-05-06 00:18:07,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:18:07,080 INFO L225 Difference]: With dead ends: 97 [2021-05-06 00:18:07,080 INFO L226 Difference]: Without dead ends: 94 [2021-05-06 00:18:07,080 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3556.9ms TimeCoverageRelationStatistics Valid=171, Invalid=7139, Unknown=0, NotChecked=0, Total=7310 [2021-05-06 00:18:07,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-05-06 00:18:07,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2021-05-06 00:18:07,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 90 states have (on average 1.011111111111111) internal successors, (91), 90 states have internal predecessors, (91), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:18:07,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2021-05-06 00:18:07,084 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 92 [2021-05-06 00:18:07,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:18:07,084 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2021-05-06 00:18:07,084 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 85 states, 85 states have (on average 1.0470588235294118) internal successors, (89), 85 states have internal predecessors, (89), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:18:07,085 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2021-05-06 00:18:07,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-05-06 00:18:07,085 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:18:07,085 INFO L523 BasicCegarLoop]: trace histogram [82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:18:07,285 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:18:07,285 INFO L428 AbstractCegarLoop]: === Iteration 83 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:18:07,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:18:07,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1277895409, now seen corresponding path program 82 times [2021-05-06 00:18:07,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:18:07,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114851943] [2021-05-06 00:18:07,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:18:07,292 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:18:07,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1383581070] [2021-05-06 00:18:07,292 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:18:07,400 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 00:18:07,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:18:07,408 WARN L261 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 336 conjunts are in the unsatisfiable core [2021-05-06 00:18:07,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:18:10,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:18:10,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:18:10,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:18:10,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:18:10,697 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:18:10,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:18:10,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114851943] [2021-05-06 00:18:10,698 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:18:10,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383581070] [2021-05-06 00:18:10,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383581070] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:18:10,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:18:10,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86] total 86 [2021-05-06 00:18:10,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584583762] [2021-05-06 00:18:10,698 INFO L460 AbstractCegarLoop]: Interpolant automaton has 86 states [2021-05-06 00:18:10,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:18:10,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-05-06 00:18:10,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=7141, Unknown=0, NotChecked=0, Total=7310 [2021-05-06 00:18:10,698 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand has 86 states, 86 states have (on average 1.0465116279069768) internal successors, (90), 86 states have internal predecessors, (90), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:18:29,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:18:29,042 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2021-05-06 00:18:29,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-05-06 00:18:29,042 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 1.0465116279069768) internal successors, (90), 86 states have internal predecessors, (90), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2021-05-06 00:18:29,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:18:29,043 INFO L225 Difference]: With dead ends: 98 [2021-05-06 00:18:29,043 INFO L226 Difference]: Without dead ends: 95 [2021-05-06 00:18:29,043 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3197.0ms TimeCoverageRelationStatistics Valid=173, Invalid=7309, Unknown=0, NotChecked=0, Total=7482 [2021-05-06 00:18:29,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-05-06 00:18:29,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2021-05-06 00:18:29,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 91 states have (on average 1.010989010989011) internal successors, (92), 91 states have internal predecessors, (92), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:18:29,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2021-05-06 00:18:29,047 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 93 [2021-05-06 00:18:29,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:18:29,047 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2021-05-06 00:18:29,047 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 86 states, 86 states have (on average 1.0465116279069768) internal successors, (90), 86 states have internal predecessors, (90), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:18:29,048 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2021-05-06 00:18:29,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-05-06 00:18:29,048 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:18:29,048 INFO L523 BasicCegarLoop]: trace histogram [83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:18:29,248 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2021-05-06 00:18:29,248 INFO L428 AbstractCegarLoop]: === Iteration 84 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:18:29,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:18:29,249 INFO L82 PathProgramCache]: Analyzing trace with hash 959989547, now seen corresponding path program 83 times [2021-05-06 00:18:29,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:18:29,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718744478] [2021-05-06 00:18:29,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:18:29,255 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:18:29,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [536345358] [2021-05-06 00:18:29,255 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:18:29,372 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2021-05-06 00:18:29,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:18:29,376 WARN L261 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 340 conjunts are in the unsatisfiable core [2021-05-06 00:18:29,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:18:32,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:18:32,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:18:32,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:18:32,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:18:32,506 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:18:32,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:18:32,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718744478] [2021-05-06 00:18:32,506 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:18:32,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536345358] [2021-05-06 00:18:32,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536345358] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:18:32,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:18:32,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87] total 87 [2021-05-06 00:18:32,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972666184] [2021-05-06 00:18:32,507 INFO L460 AbstractCegarLoop]: Interpolant automaton has 87 states [2021-05-06 00:18:32,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:18:32,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-05-06 00:18:32,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=7311, Unknown=0, NotChecked=0, Total=7482 [2021-05-06 00:18:32,507 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand has 87 states, 87 states have (on average 1.0459770114942528) internal successors, (91), 87 states have internal predecessors, (91), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:18:54,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:18:54,009 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2021-05-06 00:18:54,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-05-06 00:18:54,009 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 1.0459770114942528) internal successors, (91), 87 states have internal predecessors, (91), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 94 [2021-05-06 00:18:54,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:18:54,010 INFO L225 Difference]: With dead ends: 99 [2021-05-06 00:18:54,010 INFO L226 Difference]: Without dead ends: 96 [2021-05-06 00:18:54,010 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3044.2ms TimeCoverageRelationStatistics Valid=175, Invalid=7481, Unknown=0, NotChecked=0, Total=7656 [2021-05-06 00:18:54,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-05-06 00:18:54,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2021-05-06 00:18:54,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 92 states have (on average 1.0108695652173914) internal successors, (93), 92 states have internal predecessors, (93), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:18:54,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2021-05-06 00:18:54,014 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 94 [2021-05-06 00:18:54,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:18:54,015 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2021-05-06 00:18:54,015 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 87 states, 87 states have (on average 1.0459770114942528) internal successors, (91), 87 states have internal predecessors, (91), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:18:54,015 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2021-05-06 00:18:54,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-05-06 00:18:54,015 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:18:54,015 INFO L523 BasicCegarLoop]: trace histogram [84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:18:54,228 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable247 [2021-05-06 00:18:54,229 INFO L428 AbstractCegarLoop]: === Iteration 85 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:18:54,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:18:54,229 INFO L82 PathProgramCache]: Analyzing trace with hash -305157583, now seen corresponding path program 84 times [2021-05-06 00:18:54,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:18:54,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508559163] [2021-05-06 00:18:54,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:18:54,235 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:18:54,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2061140832] [2021-05-06 00:18:54,235 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:18:54,361 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2021-05-06 00:18:54,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:18:54,367 WARN L261 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 344 conjunts are in the unsatisfiable core [2021-05-06 00:18:54,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:18:57,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:18:57,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:18:57,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:18:57,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:18:57,835 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:18:57,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:18:57,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508559163] [2021-05-06 00:18:57,835 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:18:57,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061140832] [2021-05-06 00:18:57,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061140832] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:18:57,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:18:57,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88] total 88 [2021-05-06 00:18:57,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114364436] [2021-05-06 00:18:57,836 INFO L460 AbstractCegarLoop]: Interpolant automaton has 88 states [2021-05-06 00:18:57,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:18:57,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2021-05-06 00:18:57,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=7483, Unknown=0, NotChecked=0, Total=7656 [2021-05-06 00:18:57,836 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand has 88 states, 88 states have (on average 1.0454545454545454) internal successors, (92), 88 states have internal predecessors, (92), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:19:26,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:19:26,117 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2021-05-06 00:19:26,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-05-06 00:19:26,117 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 1.0454545454545454) internal successors, (92), 88 states have internal predecessors, (92), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 95 [2021-05-06 00:19:26,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:19:26,118 INFO L225 Difference]: With dead ends: 100 [2021-05-06 00:19:26,118 INFO L226 Difference]: Without dead ends: 97 [2021-05-06 00:19:26,118 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3364.5ms TimeCoverageRelationStatistics Valid=177, Invalid=7655, Unknown=0, NotChecked=0, Total=7832 [2021-05-06 00:19:26,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-05-06 00:19:26,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2021-05-06 00:19:26,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 93 states have (on average 1.010752688172043) internal successors, (94), 93 states have internal predecessors, (94), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:19:26,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2021-05-06 00:19:26,126 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 95 [2021-05-06 00:19:26,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:19:26,126 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2021-05-06 00:19:26,126 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 88 states, 88 states have (on average 1.0454545454545454) internal successors, (92), 88 states have internal predecessors, (92), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:19:26,126 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2021-05-06 00:19:26,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-05-06 00:19:26,127 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:19:26,127 INFO L523 BasicCegarLoop]: trace histogram [85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:19:26,332 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:19:26,333 INFO L428 AbstractCegarLoop]: === Iteration 86 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:19:26,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:19:26,333 INFO L82 PathProgramCache]: Analyzing trace with hash -870012949, now seen corresponding path program 85 times [2021-05-06 00:19:26,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:19:26,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25903160] [2021-05-06 00:19:26,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:19:26,340 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:19:26,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [666038086] [2021-05-06 00:19:26,346 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:19:26,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 00:19:26,444 WARN L261 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 348 conjunts are in the unsatisfiable core [2021-05-06 00:19:26,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:19:29,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:19:29,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:19:29,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:19:29,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:19:29,993 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:19:29,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:19:29,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25903160] [2021-05-06 00:19:29,993 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:19:29,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666038086] [2021-05-06 00:19:29,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666038086] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:19:29,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:19:29,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89] total 89 [2021-05-06 00:19:29,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753152589] [2021-05-06 00:19:29,994 INFO L460 AbstractCegarLoop]: Interpolant automaton has 89 states [2021-05-06 00:19:29,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:19:29,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2021-05-06 00:19:29,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=7657, Unknown=0, NotChecked=0, Total=7832 [2021-05-06 00:19:29,994 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand has 89 states, 89 states have (on average 1.0449438202247192) internal successors, (93), 89 states have internal predecessors, (93), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:20:04,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:20:04,812 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2021-05-06 00:20:04,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-05-06 00:20:04,812 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 1.0449438202247192) internal successors, (93), 89 states have internal predecessors, (93), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 96 [2021-05-06 00:20:04,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:20:04,812 INFO L225 Difference]: With dead ends: 101 [2021-05-06 00:20:04,812 INFO L226 Difference]: Without dead ends: 98 [2021-05-06 00:20:04,813 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3444.6ms TimeCoverageRelationStatistics Valid=179, Invalid=7831, Unknown=0, NotChecked=0, Total=8010 [2021-05-06 00:20:04,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-05-06 00:20:04,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2021-05-06 00:20:04,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 94 states have (on average 1.0106382978723405) internal successors, (95), 94 states have internal predecessors, (95), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:20:04,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2021-05-06 00:20:04,818 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 96 [2021-05-06 00:20:04,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:20:04,818 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2021-05-06 00:20:04,818 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 89 states, 89 states have (on average 1.0449438202247192) internal successors, (93), 89 states have internal predecessors, (93), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:20:04,818 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2021-05-06 00:20:04,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-05-06 00:20:04,818 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:20:04,818 INFO L523 BasicCegarLoop]: trace histogram [86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:20:05,021 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable253 [2021-05-06 00:20:05,021 INFO L428 AbstractCegarLoop]: === Iteration 87 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:20:05,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:20:05,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1200660111, now seen corresponding path program 86 times [2021-05-06 00:20:05,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:20:05,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133851864] [2021-05-06 00:20:05,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:20:05,028 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:20:05,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2096260272] [2021-05-06 00:20:05,028 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:20:05,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 00:20:05,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:20:05,160 WARN L261 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 352 conjunts are in the unsatisfiable core [2021-05-06 00:20:05,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:20:08,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:20:08,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:20:08,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:20:08,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:20:08,962 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:20:08,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:20:08,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133851864] [2021-05-06 00:20:08,963 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:20:08,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096260272] [2021-05-06 00:20:08,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096260272] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:20:08,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:20:08,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90] total 90 [2021-05-06 00:20:08,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680989100] [2021-05-06 00:20:08,963 INFO L460 AbstractCegarLoop]: Interpolant automaton has 90 states [2021-05-06 00:20:08,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:20:08,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-05-06 00:20:08,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=7833, Unknown=0, NotChecked=0, Total=8010 [2021-05-06 00:20:08,964 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand has 90 states, 90 states have (on average 1.0444444444444445) internal successors, (94), 90 states have internal predecessors, (94), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:20:42,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:20:42,868 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2021-05-06 00:20:42,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-05-06 00:20:42,868 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 1.0444444444444445) internal successors, (94), 90 states have internal predecessors, (94), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 97 [2021-05-06 00:20:42,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:20:42,869 INFO L225 Difference]: With dead ends: 102 [2021-05-06 00:20:42,869 INFO L226 Difference]: Without dead ends: 99 [2021-05-06 00:20:42,869 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3685.7ms TimeCoverageRelationStatistics Valid=181, Invalid=8009, Unknown=0, NotChecked=0, Total=8190 [2021-05-06 00:20:42,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-05-06 00:20:42,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2021-05-06 00:20:42,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 95 states have (on average 1.0105263157894737) internal successors, (96), 95 states have internal predecessors, (96), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:20:42,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2021-05-06 00:20:42,874 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 97 [2021-05-06 00:20:42,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:20:42,874 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2021-05-06 00:20:42,874 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 90 states, 90 states have (on average 1.0444444444444445) internal successors, (94), 90 states have internal predecessors, (94), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:20:42,874 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2021-05-06 00:20:42,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-05-06 00:20:42,874 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:20:42,874 INFO L523 BasicCegarLoop]: trace histogram [87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:20:43,091 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2021-05-06 00:20:43,092 INFO L428 AbstractCegarLoop]: === Iteration 88 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:20:43,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:20:43,092 INFO L82 PathProgramCache]: Analyzing trace with hash 1434179755, now seen corresponding path program 87 times [2021-05-06 00:20:43,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:20:43,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815311588] [2021-05-06 00:20:43,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:20:43,098 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:20:43,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [146579554] [2021-05-06 00:20:43,098 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:20:43,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2021-05-06 00:20:43,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:20:43,239 WARN L261 TraceCheckSpWp]: Trace formula consists of 540 conjuncts, 356 conjunts are in the unsatisfiable core [2021-05-06 00:20:43,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:20:46,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:20:46,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:20:46,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:20:46,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:20:47,066 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:20:47,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:20:47,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815311588] [2021-05-06 00:20:47,066 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:20:47,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146579554] [2021-05-06 00:20:47,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146579554] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:20:47,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:20:47,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91] total 91 [2021-05-06 00:20:47,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558592340] [2021-05-06 00:20:47,067 INFO L460 AbstractCegarLoop]: Interpolant automaton has 91 states [2021-05-06 00:20:47,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:20:47,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2021-05-06 00:20:47,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=8011, Unknown=0, NotChecked=0, Total=8190 [2021-05-06 00:20:47,067 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand has 91 states, 91 states have (on average 1.043956043956044) internal successors, (95), 91 states have internal predecessors, (95), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:21:32,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:21:32,320 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2021-05-06 00:21:32,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-05-06 00:21:32,321 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 1.043956043956044) internal successors, (95), 91 states have internal predecessors, (95), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 98 [2021-05-06 00:21:32,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:21:32,321 INFO L225 Difference]: With dead ends: 103 [2021-05-06 00:21:32,321 INFO L226 Difference]: Without dead ends: 100 [2021-05-06 00:21:32,321 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3754.4ms TimeCoverageRelationStatistics Valid=183, Invalid=8189, Unknown=0, NotChecked=0, Total=8372 [2021-05-06 00:21:32,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-05-06 00:21:32,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2021-05-06 00:21:32,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 96 states have (on average 1.0104166666666667) internal successors, (97), 96 states have internal predecessors, (97), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:21:32,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2021-05-06 00:21:32,330 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 98 [2021-05-06 00:21:32,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:21:32,330 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2021-05-06 00:21:32,330 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 91 states, 91 states have (on average 1.043956043956044) internal successors, (95), 91 states have internal predecessors, (95), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:21:32,330 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2021-05-06 00:21:32,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-05-06 00:21:32,330 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:21:32,330 INFO L523 BasicCegarLoop]: trace histogram [88, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:21:32,532 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable259,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:21:32,533 INFO L428 AbstractCegarLoop]: === Iteration 89 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:21:32,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:21:32,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1509836977, now seen corresponding path program 88 times [2021-05-06 00:21:32,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:21:32,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605542747] [2021-05-06 00:21:32,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:21:32,539 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:21:32,539 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [160399787] [2021-05-06 00:21:32,539 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:21:32,691 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 00:21:32,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:21:32,841 WARN L261 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 360 conjunts are in the unsatisfiable core [2021-05-06 00:21:32,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:21:36,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:21:36,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:21:36,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:21:36,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:21:36,788 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:21:36,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:21:36,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605542747] [2021-05-06 00:21:36,788 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:21:36,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160399787] [2021-05-06 00:21:36,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160399787] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:21:36,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:21:36,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [92] total 92 [2021-05-06 00:21:36,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884415872] [2021-05-06 00:21:36,789 INFO L460 AbstractCegarLoop]: Interpolant automaton has 92 states [2021-05-06 00:21:36,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:21:36,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2021-05-06 00:21:36,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=8191, Unknown=0, NotChecked=0, Total=8372 [2021-05-06 00:21:36,789 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand has 92 states, 92 states have (on average 1.0434782608695652) internal successors, (96), 92 states have internal predecessors, (96), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:22:26,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:22:26,320 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2021-05-06 00:22:26,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-05-06 00:22:26,320 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 1.0434782608695652) internal successors, (96), 92 states have internal predecessors, (96), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 99 [2021-05-06 00:22:26,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:22:26,320 INFO L225 Difference]: With dead ends: 104 [2021-05-06 00:22:26,320 INFO L226 Difference]: Without dead ends: 101 [2021-05-06 00:22:26,321 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3838.2ms TimeCoverageRelationStatistics Valid=185, Invalid=8371, Unknown=0, NotChecked=0, Total=8556 [2021-05-06 00:22:26,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-05-06 00:22:26,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2021-05-06 00:22:26,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 97 states have (on average 1.0103092783505154) internal successors, (98), 97 states have internal predecessors, (98), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:22:26,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2021-05-06 00:22:26,325 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 99 [2021-05-06 00:22:26,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:22:26,325 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2021-05-06 00:22:26,326 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 92 states, 92 states have (on average 1.0434782608695652) internal successors, (96), 92 states have internal predecessors, (96), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:22:26,326 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2021-05-06 00:22:26,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-05-06 00:22:26,326 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:22:26,326 INFO L523 BasicCegarLoop]: trace histogram [89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:22:26,543 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:22:26,543 INFO L428 AbstractCegarLoop]: === Iteration 90 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:22:26,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:22:26,543 INFO L82 PathProgramCache]: Analyzing trace with hash -439756437, now seen corresponding path program 89 times [2021-05-06 00:22:26,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:22:26,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162534778] [2021-05-06 00:22:26,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:22:26,549 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:22:26,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2024230345] [2021-05-06 00:22:26,550 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:22:26,708 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2021-05-06 00:22:26,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:22:26,713 WARN L261 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 364 conjunts are in the unsatisfiable core [2021-05-06 00:22:26,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:22:30,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:22:30,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:22:30,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:22:30,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:22:30,492 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:22:30,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:22:30,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162534778] [2021-05-06 00:22:30,492 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:22:30,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024230345] [2021-05-06 00:22:30,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024230345] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:22:30,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:22:30,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93] total 93 [2021-05-06 00:22:30,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886568680] [2021-05-06 00:22:30,493 INFO L460 AbstractCegarLoop]: Interpolant automaton has 93 states [2021-05-06 00:22:30,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:22:30,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2021-05-06 00:22:30,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=8373, Unknown=0, NotChecked=0, Total=8556 [2021-05-06 00:22:30,493 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand has 93 states, 93 states have (on average 1.043010752688172) internal successors, (97), 93 states have internal predecessors, (97), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:23:17,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:23:17,740 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2021-05-06 00:23:17,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-05-06 00:23:17,741 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 1.043010752688172) internal successors, (97), 93 states have internal predecessors, (97), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 100 [2021-05-06 00:23:17,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:23:17,741 INFO L225 Difference]: With dead ends: 105 [2021-05-06 00:23:17,741 INFO L226 Difference]: Without dead ends: 102 [2021-05-06 00:23:17,741 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3676.3ms TimeCoverageRelationStatistics Valid=187, Invalid=8555, Unknown=0, NotChecked=0, Total=8742 [2021-05-06 00:23:17,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-05-06 00:23:17,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2021-05-06 00:23:17,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 98 states have (on average 1.010204081632653) internal successors, (99), 98 states have internal predecessors, (99), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:23:17,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2021-05-06 00:23:17,746 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 100 [2021-05-06 00:23:17,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:23:17,746 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2021-05-06 00:23:17,746 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 93 states, 93 states have (on average 1.043010752688172) internal successors, (97), 93 states have internal predecessors, (97), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:23:17,746 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2021-05-06 00:23:17,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-05-06 00:23:17,747 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:23:17,747 INFO L523 BasicCegarLoop]: trace histogram [90, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:23:17,947 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2021-05-06 00:23:17,947 INFO L428 AbstractCegarLoop]: === Iteration 91 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:23:17,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:23:17,948 INFO L82 PathProgramCache]: Analyzing trace with hash -747610127, now seen corresponding path program 90 times [2021-05-06 00:23:17,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:23:17,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300090815] [2021-05-06 00:23:17,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:23:17,958 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:23:17,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [686322920] [2021-05-06 00:23:17,959 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:23:18,143 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2021-05-06 00:23:18,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:23:18,161 WARN L261 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 368 conjunts are in the unsatisfiable core [2021-05-06 00:23:18,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:23:22,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:23:22,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:23:22,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:23:22,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:23:22,746 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:23:22,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:23:22,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300090815] [2021-05-06 00:23:22,747 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:23:22,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686322920] [2021-05-06 00:23:22,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686322920] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:23:22,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:23:22,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [94] total 94 [2021-05-06 00:23:22,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798576005] [2021-05-06 00:23:22,747 INFO L460 AbstractCegarLoop]: Interpolant automaton has 94 states [2021-05-06 00:23:22,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:23:22,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-05-06 00:23:22,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=8557, Unknown=0, NotChecked=0, Total=8742 [2021-05-06 00:23:22,748 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand has 94 states, 94 states have (on average 1.0425531914893618) internal successors, (98), 94 states have internal predecessors, (98), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:24:31,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:24:31,990 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2021-05-06 00:24:31,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-05-06 00:24:31,990 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 1.0425531914893618) internal successors, (98), 94 states have internal predecessors, (98), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 101 [2021-05-06 00:24:31,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:24:31,991 INFO L225 Difference]: With dead ends: 106 [2021-05-06 00:24:31,991 INFO L226 Difference]: Without dead ends: 103 [2021-05-06 00:24:31,991 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4468.3ms TimeCoverageRelationStatistics Valid=189, Invalid=8741, Unknown=0, NotChecked=0, Total=8930 [2021-05-06 00:24:31,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-05-06 00:24:31,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2021-05-06 00:24:31,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 99 states have (on average 1.0101010101010102) internal successors, (100), 99 states have internal predecessors, (100), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:24:31,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2021-05-06 00:24:31,996 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 101 [2021-05-06 00:24:31,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:24:31,996 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2021-05-06 00:24:31,997 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 94 states, 94 states have (on average 1.0425531914893618) internal successors, (98), 94 states have internal predecessors, (98), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:24:31,997 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2021-05-06 00:24:31,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-06 00:24:31,997 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:24:31,997 INFO L523 BasicCegarLoop]: trace histogram [91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:24:32,197 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2021-05-06 00:24:32,198 INFO L428 AbstractCegarLoop]: === Iteration 92 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:24:32,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:24:32,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1701139925, now seen corresponding path program 91 times [2021-05-06 00:24:32,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:24:32,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398708324] [2021-05-06 00:24:32,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:24:32,204 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:24:32,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1439837754] [2021-05-06 00:24:32,205 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:24:32,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 00:24:32,319 WARN L261 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 372 conjunts are in the unsatisfiable core [2021-05-06 00:24:32,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:24:37,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:24:37,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:24:37,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:24:37,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:24:37,329 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:24:37,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:24:37,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398708324] [2021-05-06 00:24:37,329 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:24:37,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439837754] [2021-05-06 00:24:37,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439837754] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:24:37,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:24:37,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95] total 95 [2021-05-06 00:24:37,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483204953] [2021-05-06 00:24:37,329 INFO L460 AbstractCegarLoop]: Interpolant automaton has 95 states [2021-05-06 00:24:37,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:24:37,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2021-05-06 00:24:37,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=8743, Unknown=0, NotChecked=0, Total=8930 [2021-05-06 00:24:37,330 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand has 95 states, 95 states have (on average 1.0421052631578946) internal successors, (99), 95 states have internal predecessors, (99), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:25:37,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:25:37,057 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2021-05-06 00:25:37,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-05-06 00:25:37,058 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 1.0421052631578946) internal successors, (99), 95 states have internal predecessors, (99), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2021-05-06 00:25:37,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:25:37,058 INFO L225 Difference]: With dead ends: 107 [2021-05-06 00:25:37,058 INFO L226 Difference]: Without dead ends: 104 [2021-05-06 00:25:37,059 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4887.5ms TimeCoverageRelationStatistics Valid=191, Invalid=8929, Unknown=0, NotChecked=0, Total=9120 [2021-05-06 00:25:37,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-05-06 00:25:37,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2021-05-06 00:25:37,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 100 states have (on average 1.01) internal successors, (101), 100 states have internal predecessors, (101), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:25:37,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2021-05-06 00:25:37,064 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 102 [2021-05-06 00:25:37,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:25:37,064 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2021-05-06 00:25:37,064 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 95 states, 95 states have (on average 1.0421052631578946) internal successors, (99), 95 states have internal predecessors, (99), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:25:37,064 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2021-05-06 00:25:37,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-05-06 00:25:37,064 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:25:37,064 INFO L523 BasicCegarLoop]: trace histogram [92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:25:37,273 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable271,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:25:37,273 INFO L428 AbstractCegarLoop]: === Iteration 93 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:25:37,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:25:37,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1195792591, now seen corresponding path program 92 times [2021-05-06 00:25:37,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:25:37,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973314591] [2021-05-06 00:25:37,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:25:37,280 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:25:37,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1553244072] [2021-05-06 00:25:37,280 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:25:37,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 00:25:37,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:25:37,413 WARN L261 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 376 conjunts are in the unsatisfiable core [2021-05-06 00:25:37,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:25:42,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:25:42,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:25:42,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:25:42,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:25:42,326 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:25:42,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:25:42,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973314591] [2021-05-06 00:25:42,326 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:25:42,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553244072] [2021-05-06 00:25:42,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553244072] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:25:42,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:25:42,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96] total 96 [2021-05-06 00:25:42,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424338981] [2021-05-06 00:25:42,326 INFO L460 AbstractCegarLoop]: Interpolant automaton has 96 states [2021-05-06 00:25:42,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:25:42,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-05-06 00:25:42,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=8931, Unknown=0, NotChecked=0, Total=9120 [2021-05-06 00:25:42,327 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand has 96 states, 96 states have (on average 1.0416666666666667) internal successors, (100), 96 states have internal predecessors, (100), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)