/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/nla-digbench-scaling/prod4br-ll_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 04:13:04,937 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 04:13:04,938 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 04:13:04,959 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 04:13:04,975 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 04:13:04,977 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 04:13:04,978 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 04:13:04,979 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 04:13:04,979 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 04:13:04,980 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 04:13:04,983 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 04:13:04,987 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 04:13:04,988 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 04:13:04,990 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 04:13:04,991 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 04:13:04,992 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 04:13:04,997 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 04:13:05,003 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 04:13:05,004 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 04:13:05,004 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 04:13:05,007 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 04:13:05,035 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 04:13:05,036 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 04:13:05,037 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 04:13:05,037 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 04:13:05,037 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 04:13:05,037 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 04:13:05,037 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 04:13:05,037 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 04:13:05,037 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 04:13:05,038 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 04:13:05,038 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 04:13:05,038 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 04:13:05,038 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 04:13:05,039 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 04:13:05,039 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 04:13:05,039 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 04:13:05,039 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 04:13:05,039 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 04:13:05,039 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 04:13:05,039 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 04:13:05,040 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 04:13:05,040 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 04:13:05,040 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 04:13:05,040 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 04:13:05,040 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 04:13:05,040 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 04:13:05,040 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 04:13:05,040 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 04:13:05,040 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 04:13:05,303 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 04:13:05,320 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 04:13:05,323 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 04:13:05,324 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 04:13:05,325 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 04:13:05,325 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_unwindbound100.c [2021-05-06 04:13:05,385 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/20031f777/d983e0f9f2d44c2cb2455079a2fcb8f7/FLAGd08b2ed25 [2021-05-06 04:13:05,760 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 04:13:05,760 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_unwindbound100.c [2021-05-06 04:13:05,764 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/20031f777/d983e0f9f2d44c2cb2455079a2fcb8f7/FLAGd08b2ed25 [2021-05-06 04:13:06,179 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/20031f777/d983e0f9f2d44c2cb2455079a2fcb8f7 [2021-05-06 04:13:06,180 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 04:13:06,182 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 04:13:06,185 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 04:13:06,185 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 04:13:06,187 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 04:13:06,188 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 04:13:06" (1/1) ... [2021-05-06 04:13:06,189 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@177f601 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:13:06, skipping insertion in model container [2021-05-06 04:13:06,189 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 04:13:06" (1/1) ... [2021-05-06 04:13:06,194 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 04:13:06,205 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 04:13:06,322 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_unwindbound100.c[524,537] [2021-05-06 04:13:06,356 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 04:13:06,385 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 04:13:06,396 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_unwindbound100.c[524,537] [2021-05-06 04:13:06,400 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 04:13:06,413 INFO L208 MainTranslator]: Completed translation [2021-05-06 04:13:06,414 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:13:06 WrapperNode [2021-05-06 04:13:06,414 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 04:13:06,415 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 04:13:06,415 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 04:13:06,415 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 04:13:06,423 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:13:06" (1/1) ... [2021-05-06 04:13:06,423 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:13:06" (1/1) ... [2021-05-06 04:13:06,435 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:13:06" (1/1) ... [2021-05-06 04:13:06,435 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:13:06" (1/1) ... [2021-05-06 04:13:06,444 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:13:06" (1/1) ... [2021-05-06 04:13:06,447 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:13:06" (1/1) ... [2021-05-06 04:13:06,447 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:13:06" (1/1) ... [2021-05-06 04:13:06,449 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 04:13:06,449 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 04:13:06,449 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 04:13:06,449 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 04:13:06,450 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:13:06" (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 04:13:06,515 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 04:13:06,516 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 04:13:06,516 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 04:13:06,516 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 04:13:06,516 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 04:13:06,516 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 04:13:06,516 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 04:13:06,517 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 04:13:06,517 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 04:13:06,517 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 04:13:06,517 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 04:13:06,518 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 04:13:06,518 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 04:13:06,518 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 04:13:06,519 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 04:13:06,520 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 04:13:06,520 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 04:13:06,520 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 04:13:06,520 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 04:13:06,520 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 04:13:06,769 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 04:13:06,769 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 04:13:06,770 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 04:13:06 BoogieIcfgContainer [2021-05-06 04:13:06,770 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 04:13:06,772 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 04:13:06,772 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 04:13:06,774 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 04:13:06,774 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 04:13:06" (1/3) ... [2021-05-06 04:13:06,775 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2908c5e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 04:13:06, skipping insertion in model container [2021-05-06 04:13:06,775 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:13:06" (2/3) ... [2021-05-06 04:13:06,775 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2908c5e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 04:13:06, skipping insertion in model container [2021-05-06 04:13:06,775 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 04:13:06" (3/3) ... [2021-05-06 04:13:06,776 INFO L111 eAbstractionObserver]: Analyzing ICFG prod4br-ll_unwindbound100.c [2021-05-06 04:13:06,781 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 04:13:06,783 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 04:13:06,795 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 04:13:06,813 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 04:13:06,813 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 04:13:06,813 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 04:13:06,813 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 04:13:06,813 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 04:13:06,813 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 04:13:06,813 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 04:13:06,813 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 04:13:06,824 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 04:13:06,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 04:13:06,828 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:13:06,828 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:13:06,829 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:13:06,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:13:06,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1717894843, now seen corresponding path program 1 times [2021-05-06 04:13:06,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:13:06,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996822601] [2021-05-06 04:13:06,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:13:06,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:13:06,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 04:13:06,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:13:07,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 04:13:07,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:13:07,009 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 04:13:07,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:13:07,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996822601] [2021-05-06 04:13:07,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996822601] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 04:13:07,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 04:13:07,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 04:13:07,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088598414] [2021-05-06 04:13:07,014 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 04:13:07,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:13:07,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 04:13:07,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 04:13:07,026 INFO L87 Difference]: Start difference. First operand has 32 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 04:13:07,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:13:07,094 INFO L93 Difference]: Finished difference Result 56 states and 77 transitions. [2021-05-06 04:13:07,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 04:13:07,096 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-06 04:13:07,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:13:07,100 INFO L225 Difference]: With dead ends: 56 [2021-05-06 04:13:07,101 INFO L226 Difference]: Without dead ends: 28 [2021-05-06 04:13:07,102 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 04:13:07,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-05-06 04:13:07,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2021-05-06 04:13:07,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 04:13:07,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2021-05-06 04:13:07,126 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 17 [2021-05-06 04:13:07,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:13:07,127 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2021-05-06 04:13:07,127 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 04:13:07,127 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2021-05-06 04:13:07,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 04:13:07,128 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:13:07,128 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:13:07,128 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 04:13:07,128 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:13:07,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:13:07,129 INFO L82 PathProgramCache]: Analyzing trace with hash 444281082, now seen corresponding path program 1 times [2021-05-06 04:13:07,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:13:07,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391460051] [2021-05-06 04:13:07,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:13:07,142 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:13:07,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [853753791] [2021-05-06 04:13:07,143 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 04:13:07,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:13:07,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 04:13:07,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:13:07,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:13:07,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:13:07,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:13:07,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:13:07,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:13:07,338 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 04:13:07,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:13:07,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391460051] [2021-05-06 04:13:07,339 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:13:07,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853753791] [2021-05-06 04:13:07,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853753791] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 04:13:07,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 04:13:07,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 04:13:07,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741067577] [2021-05-06 04:13:07,340 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 04:13:07,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:13:07,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 04:13:07,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 04:13:07,341 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 04:13:07,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:13:07,351 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2021-05-06 04:13:07,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 04:13:07,351 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2021-05-06 04:13:07,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:13:07,352 INFO L225 Difference]: With dead ends: 37 [2021-05-06 04:13:07,352 INFO L226 Difference]: Without dead ends: 29 [2021-05-06 04:13:07,353 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.5ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 04:13:07,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-06 04:13:07,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-05-06 04:13:07,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 04:13:07,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2021-05-06 04:13:07,358 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 18 [2021-05-06 04:13:07,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:13:07,358 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2021-05-06 04:13:07,358 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 04:13:07,358 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2021-05-06 04:13:07,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 04:13:07,358 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:13:07,359 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:13:07,565 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 04:13:07,565 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:13:07,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:13:07,566 INFO L82 PathProgramCache]: Analyzing trace with hash 446068542, now seen corresponding path program 1 times [2021-05-06 04:13:07,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:13:07,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938090990] [2021-05-06 04:13:07,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:13:07,576 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:13:07,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1899358887] [2021-05-06 04:13:07,576 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 04:13:07,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:13:07,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 04:13:07,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:13:07,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:13:07,693 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 04:13:07,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:13:07,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938090990] [2021-05-06 04:13:07,694 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:13:07,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899358887] [2021-05-06 04:13:07,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899358887] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 04:13:07,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 04:13:07,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 04:13:07,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357710241] [2021-05-06 04:13:07,695 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 04:13:07,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:13:07,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 04:13:07,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 04:13:07,700 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 04:13:07,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:13:07,774 INFO L93 Difference]: Finished difference Result 42 states and 53 transitions. [2021-05-06 04:13:07,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 04:13:07,775 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-06 04:13:07,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:13:07,777 INFO L225 Difference]: With dead ends: 42 [2021-05-06 04:13:07,777 INFO L226 Difference]: Without dead ends: 40 [2021-05-06 04:13:07,778 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.7ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 04:13:07,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-06 04:13:07,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2021-05-06 04:13:07,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 24 states have internal predecessors, (28), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 04:13:07,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2021-05-06 04:13:07,792 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 18 [2021-05-06 04:13:07,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:13:07,793 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2021-05-06 04:13:07,793 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 04:13:07,793 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2021-05-06 04:13:07,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-06 04:13:07,794 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:13:07,794 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:13:08,005 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:13:08,005 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:13:08,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:13:08,006 INFO L82 PathProgramCache]: Analyzing trace with hash -1308579644, now seen corresponding path program 1 times [2021-05-06 04:13:08,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:13:08,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257178855] [2021-05-06 04:13:08,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:13:08,022 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:13:08,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1759564453] [2021-05-06 04:13:08,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:13:08,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:13:08,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 04:13:08,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:13:08,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:13:08,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:13:08,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:13:08,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:13:08,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:13:08,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:13:08,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:13:08,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:13:08,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:13:08,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:13:08,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:13:08,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:13:08,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:13:08,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:13:08,303 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 04:13:08,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:13:08,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257178855] [2021-05-06 04:13:08,303 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:13:08,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759564453] [2021-05-06 04:13:08,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759564453] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:13:08,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:13:08,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 04:13:08,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315572806] [2021-05-06 04:13:08,304 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 04:13:08,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:13:08,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 04:13:08,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-05-06 04:13:08,305 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 9 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 04:13:14,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:13:14,614 INFO L93 Difference]: Finished difference Result 51 states and 64 transitions. [2021-05-06 04:13:14,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 04:13:14,617 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 9 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2021-05-06 04:13:14,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:13:14,620 INFO L225 Difference]: With dead ends: 51 [2021-05-06 04:13:14,620 INFO L226 Difference]: Without dead ends: 43 [2021-05-06 04:13:14,621 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 204.2ms TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-05-06 04:13:14,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-06 04:13:14,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2021-05-06 04:13:14,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 29 states have internal predecessors, (36), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 04:13:14,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2021-05-06 04:13:14,637 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 24 [2021-05-06 04:13:14,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:13:14,637 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2021-05-06 04:13:14,638 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 9 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 04:13:14,638 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2021-05-06 04:13:14,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-06 04:13:14,638 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:13:14,638 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:13:14,839 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:13:14,839 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:13:14,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:13:14,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1797927234, now seen corresponding path program 1 times [2021-05-06 04:13:14,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:13:14,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669899862] [2021-05-06 04:13:14,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:13:14,848 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:13:14,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1833452376] [2021-05-06 04:13:14,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 04:13:14,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:13:14,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 04:13:14,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:13:14,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:13:14,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:13:14,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:13:14,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:13:14,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:13:14,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:13:14,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:13:14,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:13:14,994 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 04:13:14,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:13:14,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669899862] [2021-05-06 04:13:14,994 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:13:14,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833452376] [2021-05-06 04:13:14,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833452376] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:13:14,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:13:14,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-06 04:13:14,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318466170] [2021-05-06 04:13:14,995 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 04:13:14,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:13:14,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 04:13:14,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 04:13:14,996 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 04:13:15,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:13:15,026 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2021-05-06 04:13:15,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 04:13:15,027 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 27 [2021-05-06 04:13:15,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:13:15,028 INFO L225 Difference]: With dead ends: 56 [2021-05-06 04:13:15,029 INFO L226 Difference]: Without dead ends: 48 [2021-05-06 04:13:15,029 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 11.2ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 04:13:15,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-06 04:13:15,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-05-06 04:13:15,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 36 states have internal predecessors, (47), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 04:13:15,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 61 transitions. [2021-05-06 04:13:15,042 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 61 transitions. Word has length 27 [2021-05-06 04:13:15,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:13:15,042 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 61 transitions. [2021-05-06 04:13:15,042 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 04:13:15,042 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 61 transitions. [2021-05-06 04:13:15,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-06 04:13:15,043 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:13:15,043 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:13:15,262 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:13:15,263 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:13:15,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:13:15,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1799714694, now seen corresponding path program 1 times [2021-05-06 04:13:15,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:13:15,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664160983] [2021-05-06 04:13:15,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:13:15,273 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:13:15,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1708566712] [2021-05-06 04:13:15,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 04:13:15,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:13:15,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-06 04:13:15,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:13:15,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:13:15,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:13:15,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:13:15,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:13:15,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:13:15,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:13:15,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:13:15,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:13:15,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:13:15,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:13:15,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:13:15,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:13:15,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:13:15,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:13:15,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:13:15,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:13:15,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:13:15,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:13:15,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:13:15,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:13:15,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:13:15,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:13:15,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:13:15,607 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 04:13:15,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:13:15,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664160983] [2021-05-06 04:13:15,608 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:13:15,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708566712] [2021-05-06 04:13:15,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708566712] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:13:15,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:13:15,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 04:13:15,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088664583] [2021-05-06 04:13:15,608 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 04:13:15,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:13:15,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 04:13:15,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 04:13:15,609 INFO L87 Difference]: Start difference. First operand 48 states and 61 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 04:13:15,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:13:15,884 INFO L93 Difference]: Finished difference Result 63 states and 81 transitions. [2021-05-06 04:13:15,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 04:13:15,885 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2021-05-06 04:13:15,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:13:15,885 INFO L225 Difference]: With dead ends: 63 [2021-05-06 04:13:15,885 INFO L226 Difference]: Without dead ends: 61 [2021-05-06 04:13:15,886 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 54.1ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-06 04:13:15,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-05-06 04:13:15,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 55. [2021-05-06 04:13:15,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 40 states have (on average 1.3) internal successors, (52), 42 states have internal predecessors, (52), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 04:13:15,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2021-05-06 04:13:15,907 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 27 [2021-05-06 04:13:15,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:13:15,907 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2021-05-06 04:13:15,907 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 04:13:15,907 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2021-05-06 04:13:15,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 04:13:15,908 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:13:15,908 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:13:16,124 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:13:16,124 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:13:16,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:13:16,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1357155568, now seen corresponding path program 1 times [2021-05-06 04:13:16,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:13:16,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027467269] [2021-05-06 04:13:16,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:13:16,132 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:13:16,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1583675552] [2021-05-06 04:13:16,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:13:16,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:13:16,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-06 04:13:16,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:13:16,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:13:16,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:13:16,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:13:16,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:13:16,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:13:16,377 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 04:13:16,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:13:16,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027467269] [2021-05-06 04:13:16,378 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:13:16,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583675552] [2021-05-06 04:13:16,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583675552] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:13:16,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:13:16,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 04:13:16,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409495063] [2021-05-06 04:13:16,378 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 04:13:16,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:13:16,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 04:13:16,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-06 04:13:16,379 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 04:13:16,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:13:16,649 INFO L93 Difference]: Finished difference Result 79 states and 102 transitions. [2021-05-06 04:13:16,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 04:13:16,652 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2021-05-06 04:13:16,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:13:16,653 INFO L225 Difference]: With dead ends: 79 [2021-05-06 04:13:16,653 INFO L226 Difference]: Without dead ends: 64 [2021-05-06 04:13:16,654 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 128.1ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-06 04:13:16,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-06 04:13:16,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-05-06 04:13:16,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 47 states have (on average 1.297872340425532) internal successors, (61), 49 states have internal predecessors, (61), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 04:13:16,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 79 transitions. [2021-05-06 04:13:16,661 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 79 transitions. Word has length 28 [2021-05-06 04:13:16,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:13:16,661 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 79 transitions. [2021-05-06 04:13:16,661 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 04:13:16,661 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 79 transitions. [2021-05-06 04:13:16,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-06 04:13:16,662 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:13:16,662 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:13:16,864 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:13:16,865 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:13:16,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:13:16,865 INFO L82 PathProgramCache]: Analyzing trace with hash -293334773, now seen corresponding path program 1 times [2021-05-06 04:13:16,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:13:16,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477459250] [2021-05-06 04:13:16,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:13:16,872 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:13:16,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [107379557] [2021-05-06 04:13:16,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 04:13:16,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:13:16,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-06 04:13:16,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:13:17,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:13:17,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:13:17,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:13:17,043 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 04:13:17,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:13:17,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477459250] [2021-05-06 04:13:17,043 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:13:17,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107379557] [2021-05-06 04:13:17,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107379557] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:13:17,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:13:17,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 04:13:17,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471028752] [2021-05-06 04:13:17,044 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 04:13:17,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:13:17,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 04:13:17,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 04:13:17,044 INFO L87 Difference]: Start difference. First operand 64 states and 79 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 04:13:17,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:13:17,373 INFO L93 Difference]: Finished difference Result 92 states and 119 transitions. [2021-05-06 04:13:17,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 04:13:17,374 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2021-05-06 04:13:17,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:13:17,374 INFO L225 Difference]: With dead ends: 92 [2021-05-06 04:13:17,375 INFO L226 Difference]: Without dead ends: 77 [2021-05-06 04:13:17,375 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 65.9ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-06 04:13:17,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-05-06 04:13:17,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 74. [2021-05-06 04:13:17,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 55 states have (on average 1.290909090909091) internal successors, (71), 57 states have internal predecessors, (71), 11 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 04:13:17,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 91 transitions. [2021-05-06 04:13:17,383 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 91 transitions. Word has length 29 [2021-05-06 04:13:17,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:13:17,383 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 91 transitions. [2021-05-06 04:13:17,383 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 04:13:17,383 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 91 transitions. [2021-05-06 04:13:17,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-06 04:13:17,384 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:13:17,384 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:13:17,599 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:13:17,599 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:13:17,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:13:17,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1481672589, now seen corresponding path program 1 times [2021-05-06 04:13:17,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:13:17,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579567868] [2021-05-06 04:13:17,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:13:17,614 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:13:17,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [665928124] [2021-05-06 04:13:17,615 INFO L95 rtionOrderModulation]: Keeping assertion order 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 04:13:17,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:13:17,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-06 04:13:17,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:13:17,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:13:17,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:13:17,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:13:17,936 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 04:13:17,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:13:17,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579567868] [2021-05-06 04:13:17,936 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:13:17,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665928124] [2021-05-06 04:13:17,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665928124] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:13:17,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:13:17,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 04:13:17,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064770284] [2021-05-06 04:13:17,937 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 04:13:17,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:13:17,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 04:13:17,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 04:13:17,937 INFO L87 Difference]: Start difference. First operand 74 states and 91 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 04:13:18,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:13:18,210 INFO L93 Difference]: Finished difference Result 87 states and 109 transitions. [2021-05-06 04:13:18,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 04:13:18,210 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2021-05-06 04:13:18,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:13:18,211 INFO L225 Difference]: With dead ends: 87 [2021-05-06 04:13:18,211 INFO L226 Difference]: Without dead ends: 85 [2021-05-06 04:13:18,212 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 69.1ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-06 04:13:18,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-05-06 04:13:18,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 72. [2021-05-06 04:13:18,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 53 states have (on average 1.3018867924528301) internal successors, (69), 55 states have internal predecessors, (69), 11 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 04:13:18,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 89 transitions. [2021-05-06 04:13:18,219 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 89 transitions. Word has length 29 [2021-05-06 04:13:18,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:13:18,220 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 89 transitions. [2021-05-06 04:13:18,220 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 04:13:18,220 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 89 transitions. [2021-05-06 04:13:18,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 04:13:18,221 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:13:18,221 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:13:18,443 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-06 04:13:18,444 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:13:18,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:13:18,444 INFO L82 PathProgramCache]: Analyzing trace with hash 1680888588, now seen corresponding path program 1 times [2021-05-06 04:13:18,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:13:18,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643758400] [2021-05-06 04:13:18,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:13:18,451 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:13:18,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2046267895] [2021-05-06 04:13:18,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 04:13:18,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:13:18,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 04:13:18,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:13:18,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:13:18,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:13:18,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:13:18,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:13:18,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:13:18,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:13:18,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:13:18,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:13:18,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:13:18,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:13:18,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:13:18,635 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 04:13:18,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:13:18,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643758400] [2021-05-06 04:13:18,636 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:13:18,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046267895] [2021-05-06 04:13:18,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046267895] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 04:13:18,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 04:13:18,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-06 04:13:18,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847072171] [2021-05-06 04:13:18,636 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 04:13:18,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:13:18,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 04:13:18,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 04:13:18,637 INFO L87 Difference]: Start difference. First operand 72 states and 89 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 04:13:18,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:13:18,728 INFO L93 Difference]: Finished difference Result 98 states and 127 transitions. [2021-05-06 04:13:18,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 04:13:18,729 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 33 [2021-05-06 04:13:18,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:13:18,730 INFO L225 Difference]: With dead ends: 98 [2021-05-06 04:13:18,730 INFO L226 Difference]: Without dead ends: 90 [2021-05-06 04:13:18,732 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 46.2ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-06 04:13:18,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-05-06 04:13:18,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 85. [2021-05-06 04:13:18,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 63 states have (on average 1.3333333333333333) internal successors, (84), 66 states have internal predecessors, (84), 14 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (12), 10 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 04:13:18,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 110 transitions. [2021-05-06 04:13:18,750 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 110 transitions. Word has length 33 [2021-05-06 04:13:18,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:13:18,751 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 110 transitions. [2021-05-06 04:13:18,751 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 04:13:18,752 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 110 transitions. [2021-05-06 04:13:18,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-06 04:13:18,755 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:13:18,755 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:13:18,956 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:13:18,957 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:13:18,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:13:18,957 INFO L82 PathProgramCache]: Analyzing trace with hash 368374993, now seen corresponding path program 1 times [2021-05-06 04:13:18,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:13:18,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193143357] [2021-05-06 04:13:18,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:13:18,962 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:13:18,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1176232091] [2021-05-06 04:13:18,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 04:13:19,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:13:19,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-06 04:13:19,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:13:19,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:13:19,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:13:19,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:13:19,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:13:19,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:13:19,172 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 04:13:19,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:13:19,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193143357] [2021-05-06 04:13:19,173 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:13:19,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176232091] [2021-05-06 04:13:19,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176232091] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:13:19,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:13:19,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 04:13:19,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472736644] [2021-05-06 04:13:19,173 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 04:13:19,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:13:19,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 04:13:19,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 04:13:19,174 INFO L87 Difference]: Start difference. First operand 85 states and 110 transitions. Second operand has 9 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4)