/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/mannadiv_unwindbound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 16:13:46,888 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 16:13:46,890 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 16:13:46,910 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 16:13:46,916 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 16:13:46,917 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 16:13:46,917 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 16:13:46,918 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 16:13:46,919 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 16:13:46,919 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 16:13:46,920 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 16:13:46,933 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 16:13:46,934 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 16:13:46,937 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 16:13:46,938 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 16:13:46,938 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 16:13:46,940 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 16:13:46,945 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 16:13:46,946 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 16:13:46,946 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 16:13:46,954 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 [2021-05-02 16:13:46,983 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 16:13:46,983 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 16:13:46,984 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 16:13:46,984 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 16:13:46,984 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 16:13:46,984 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 16:13:46,985 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 16:13:46,985 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 16:13:46,985 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 16:13:46,985 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 16:13:46,985 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 16:13:46,985 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 16:13:46,985 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 16:13:46,985 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 16:13:46,985 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 16:13:46,986 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 16:13:46,986 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 16:13:46,986 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 16:13:46,986 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 16:13:46,986 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 16:13:46,986 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 16:13:46,986 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 16:13:46,986 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 16:13:46,987 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 16:13:46,987 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 16:13:46,987 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 16:13:46,987 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 16:13:46,987 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 16:13:46,987 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 16:13:47,200 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 16:13:47,214 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 16:13:47,215 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 16:13:47,216 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 16:13:47,217 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 16:13:47,217 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/mannadiv_unwindbound20.c [2021-05-02 16:13:47,264 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/88437b0b2/a3aa072ab17b434384e134ae77de7541/FLAG0042c3c62 [2021-05-02 16:13:47,624 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 16:13:47,625 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/mannadiv_unwindbound20.c [2021-05-02 16:13:47,629 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/88437b0b2/a3aa072ab17b434384e134ae77de7541/FLAG0042c3c62 [2021-05-02 16:13:48,032 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/88437b0b2/a3aa072ab17b434384e134ae77de7541 [2021-05-02 16:13:48,035 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 16:13:48,037 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 16:13:48,039 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 16:13:48,039 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 16:13:48,041 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 16:13:48,042 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 04:13:48" (1/1) ... [2021-05-02 16:13:48,042 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79697650 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:13:48, skipping insertion in model container [2021-05-02 16:13:48,043 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 04:13:48" (1/1) ... [2021-05-02 16:13:48,047 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 16:13:48,057 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 16:13:48,138 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/mannadiv_unwindbound20.c[573,586] [2021-05-02 16:13:48,148 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 16:13:48,153 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 16:13:48,191 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/mannadiv_unwindbound20.c[573,586] [2021-05-02 16:13:48,199 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 16:13:48,212 INFO L208 MainTranslator]: Completed translation [2021-05-02 16:13:48,212 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:13:48 WrapperNode [2021-05-02 16:13:48,212 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 16:13:48,215 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 16:13:48,215 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 16:13:48,216 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 16:13:48,224 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:13:48" (1/1) ... [2021-05-02 16:13:48,225 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:13:48" (1/1) ... [2021-05-02 16:13:48,229 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:13:48" (1/1) ... [2021-05-02 16:13:48,230 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:13:48" (1/1) ... [2021-05-02 16:13:48,241 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:13:48" (1/1) ... [2021-05-02 16:13:48,245 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:13:48" (1/1) ... [2021-05-02 16:13:48,249 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:13:48" (1/1) ... [2021-05-02 16:13:48,251 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 16:13:48,252 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 16:13:48,252 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 16:13:48,252 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 16:13:48,253 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:13:48" (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 [2021-05-02 16:13:48,321 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 16:13:48,321 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 16:13:48,321 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 16:13:48,321 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 16:13:48,321 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 16:13:48,322 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 16:13:48,322 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 16:13:48,322 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 16:13:48,322 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 16:13:48,323 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 16:13:48,323 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 16:13:48,323 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 16:13:48,323 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 16:13:48,323 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 16:13:48,324 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 16:13:48,324 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 16:13:48,324 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 16:13:48,324 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 16:13:48,324 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 16:13:48,324 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 16:13:48,544 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 16:13:48,544 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 16:13:48,545 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 04:13:48 BoogieIcfgContainer [2021-05-02 16:13:48,545 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 16:13:48,546 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 16:13:48,546 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 16:13:48,547 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 16:13:48,548 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 04:13:48" (1/3) ... [2021-05-02 16:13:48,548 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4344d45f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 04:13:48, skipping insertion in model container [2021-05-02 16:13:48,548 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:13:48" (2/3) ... [2021-05-02 16:13:48,548 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4344d45f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 04:13:48, skipping insertion in model container [2021-05-02 16:13:48,548 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 04:13:48" (3/3) ... [2021-05-02 16:13:48,549 INFO L111 eAbstractionObserver]: Analyzing ICFG mannadiv_unwindbound20.c [2021-05-02 16:13:48,553 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 16:13:48,555 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 16:13:48,565 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 16:13:48,579 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 16:13:48,579 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 16:13:48,579 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 16:13:48,579 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 16:13:48,579 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 16:13:48,579 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 16:13:48,579 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 16:13:48,580 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 16:13:48,590 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 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) [2021-05-02 16:13:48,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 16:13:48,593 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:13:48,594 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:13:48,594 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:13:48,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:13:48,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1859024204, now seen corresponding path program 1 times [2021-05-02 16:13:48,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:13:48,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385174038] [2021-05-02 16:13:48,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:13:48,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:13:48,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 16:13:48,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:13:48,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 16:13:48,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:13:48,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-02 16:13:48,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:13:48,735 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 16:13:48,735 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:13:48,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385174038] [2021-05-02 16:13:48,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385174038] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 16:13:48,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 16:13:48,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 16:13:48,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304025257] [2021-05-02 16:13:48,739 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 16:13:48,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:13:48,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 16:13:48,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 16:13:48,749 INFO L87 Difference]: Start difference. First operand has 30 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 16:13:48,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:13:48,834 INFO L93 Difference]: Finished difference Result 54 states and 72 transitions. [2021-05-02 16:13:48,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 16:13:48,836 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, (5), 3 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 22 [2021-05-02 16:13:48,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:13:48,840 INFO L225 Difference]: With dead ends: 54 [2021-05-02 16:13:48,841 INFO L226 Difference]: Without dead ends: 26 [2021-05-02 16:13:48,843 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 16:13:48,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-02 16:13:48,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-05-02 16:13:48,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 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) [2021-05-02 16:13:48,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2021-05-02 16:13:48,875 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 22 [2021-05-02 16:13:48,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:13:48,875 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2021-05-02 16:13:48,876 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 16:13:48,876 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2021-05-02 16:13:48,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 16:13:48,877 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:13:48,877 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:13:48,877 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 16:13:48,878 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:13:48,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:13:48,879 INFO L82 PathProgramCache]: Analyzing trace with hash 243739414, now seen corresponding path program 1 times [2021-05-02 16:13:48,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:13:48,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544397848] [2021-05-02 16:13:48,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:13:48,909 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:13:48,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2145657456] [2021-05-02 16:13:48,910 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 [2021-05-02 16:13:48,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:13:48,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 16:13:48,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:13:49,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:49,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:49,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:49,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:49,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:49,097 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 16:13:49,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:13:49,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544397848] [2021-05-02 16:13:49,098 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:13:49,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145657456] [2021-05-02 16:13:49,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145657456] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 16:13:49,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 16:13:49,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 16:13:49,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336421714] [2021-05-02 16:13:49,100 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 16:13:49,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:13:49,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 16:13:49,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 16:13:49,101 INFO L87 Difference]: Start difference. First operand 25 states and 29 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, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 16:13:49,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:13:49,116 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2021-05-02 16:13:49,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 16:13:49,117 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, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-02 16:13:49,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:13:49,118 INFO L225 Difference]: With dead ends: 34 [2021-05-02 16:13:49,118 INFO L226 Difference]: Without dead ends: 27 [2021-05-02 16:13:49,119 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 16:13:49,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-02 16:13:49,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-02 16:13:49,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 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) [2021-05-02 16:13:49,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-05-02 16:13:49,137 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 23 [2021-05-02 16:13:49,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:13:49,138 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-05-02 16:13:49,138 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, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 16:13:49,139 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-05-02 16:13:49,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 16:13:49,143 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:13:49,143 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:13:49,357 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 16:13:49,357 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:13:49,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:13:49,358 INFO L82 PathProgramCache]: Analyzing trace with hash 245526874, now seen corresponding path program 1 times [2021-05-02 16:13:49,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:13:49,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929709748] [2021-05-02 16:13:49,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:13:49,374 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:13:49,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1770098349] [2021-05-02 16:13:49,375 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 [2021-05-02 16:13:49,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:13:49,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 16:13:49,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:13:49,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:49,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:49,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:49,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:49,556 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 16:13:49,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:13:49,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929709748] [2021-05-02 16:13:49,557 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:13:49,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770098349] [2021-05-02 16:13:49,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770098349] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:13:49,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:13:49,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 16:13:49,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649119927] [2021-05-02 16:13:49,557 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 16:13:49,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:13:49,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 16:13:49,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 16:13:49,558 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 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) [2021-05-02 16:13:49,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:13:49,612 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2021-05-02 16:13:49,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 16:13:49,612 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 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 23 [2021-05-02 16:13:49,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:13:49,614 INFO L225 Difference]: With dead ends: 37 [2021-05-02 16:13:49,614 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 16:13:49,614 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 36.0ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 16:13:49,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 16:13:49,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2021-05-02 16:13:49,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.2) internal successors, (24), 22 states have internal predecessors, (24), 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) [2021-05-02 16:13:49,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2021-05-02 16:13:49,619 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 23 [2021-05-02 16:13:49,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:13:49,619 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2021-05-02 16:13:49,619 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 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) [2021-05-02 16:13:49,619 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2021-05-02 16:13:49,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 16:13:49,620 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:13:49,620 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] [2021-05-02 16:13:49,836 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:13:49,837 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:13:49,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:13:49,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1019533657, now seen corresponding path program 1 times [2021-05-02 16:13:49,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:13:49,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353465316] [2021-05-02 16:13:49,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:13:49,846 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:13:49,846 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1493775114] [2021-05-02 16:13:49,846 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 [2021-05-02 16:13:49,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:13:49,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 16:13:49,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:13:49,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:49,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:49,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:49,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:50,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:50,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:50,026 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 16:13:50,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:13:50,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353465316] [2021-05-02 16:13:50,027 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:13:50,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493775114] [2021-05-02 16:13:50,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493775114] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:13:50,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:13:50,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 16:13:50,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127776616] [2021-05-02 16:13:50,027 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 16:13:50,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:13:50,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 16:13:50,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-02 16:13:50,028 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 16:13:50,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:13:50,144 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2021-05-02 16:13:50,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 16:13:50,145 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 29 [2021-05-02 16:13:50,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:13:50,147 INFO L225 Difference]: With dead ends: 39 [2021-05-02 16:13:50,147 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 16:13:50,150 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 101.4ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-05-02 16:13:50,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 16:13:50,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 29. [2021-05-02 16:13:50,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 16:13:50,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2021-05-02 16:13:50,161 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 29 [2021-05-02 16:13:50,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:13:50,162 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2021-05-02 16:13:50,162 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 16:13:50,162 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2021-05-02 16:13:50,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 16:13:50,163 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:13:50,163 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:13:50,382 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:13:50,382 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:13:50,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:13:50,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1080225052, now seen corresponding path program 1 times [2021-05-02 16:13:50,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:13:50,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182075434] [2021-05-02 16:13:50,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:13:50,391 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:13:50,391 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1729065719] [2021-05-02 16:13:50,391 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 [2021-05-02 16:13:50,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:13:50,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 16:13:50,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:13:50,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:50,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:50,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:50,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:50,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:50,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:50,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:50,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:50,500 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 16:13:50,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:13:50,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182075434] [2021-05-02 16:13:50,501 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:13:50,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729065719] [2021-05-02 16:13:50,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729065719] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:13:50,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:13:50,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 16:13:50,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975988311] [2021-05-02 16:13:50,501 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 16:13:50,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:13:50,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 16:13:50,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 16:13:50,502 INFO L87 Difference]: Start difference. First operand 29 states and 31 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 16:13:50,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:13:50,529 INFO L93 Difference]: Finished difference Result 43 states and 46 transitions. [2021-05-02 16:13:50,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 16:13:50,529 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2021-05-02 16:13:50,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:13:50,530 INFO L225 Difference]: With dead ends: 43 [2021-05-02 16:13:50,530 INFO L226 Difference]: Without dead ends: 38 [2021-05-02 16:13:50,530 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 11.6ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 16:13:50,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-02 16:13:50,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-05-02 16:13:50,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 16:13:50,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2021-05-02 16:13:50,535 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 32 [2021-05-02 16:13:50,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:13:50,535 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2021-05-02 16:13:50,535 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, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 16:13:50,535 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2021-05-02 16:13:50,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 16:13:50,536 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:13:50,536 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:13:50,752 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:13:50,753 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:13:50,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:13:50,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1448743382, now seen corresponding path program 2 times [2021-05-02 16:13:50,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:13:50,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188658086] [2021-05-02 16:13:50,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:13:50,761 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:13:50,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1790204312] [2021-05-02 16:13:50,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:13:50,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 16:13:50,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:13:50,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 16:13:50,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:13:50,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:50,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:50,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:50,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:50,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:50,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:50,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:50,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:50,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:50,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:50,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:50,931 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 16:13:50,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:13:50,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188658086] [2021-05-02 16:13:50,932 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:13:50,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790204312] [2021-05-02 16:13:50,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790204312] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:13:50,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:13:50,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 16:13:50,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710569057] [2021-05-02 16:13:50,933 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 16:13:50,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:13:50,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 16:13:50,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 16:13:50,934 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 16:13:50,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:13:50,985 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2021-05-02 16:13:50,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 16:13:50,985 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 41 [2021-05-02 16:13:50,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:13:50,988 INFO L225 Difference]: With dead ends: 52 [2021-05-02 16:13:50,988 INFO L226 Difference]: Without dead ends: 47 [2021-05-02 16:13:50,988 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 23.2ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-02 16:13:50,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-02 16:13:50,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-05-02 16:13:50,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 33 states have (on average 1.121212121212121) internal successors, (37), 33 states have internal predecessors, (37), 8 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 16:13:50,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2021-05-02 16:13:50,997 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 41 [2021-05-02 16:13:50,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:13:50,998 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2021-05-02 16:13:50,998 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 16:13:50,998 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2021-05-02 16:13:50,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-02 16:13:50,999 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:13:50,999 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:13:51,212 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 16:13:51,213 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:13:51,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:13:51,213 INFO L82 PathProgramCache]: Analyzing trace with hash -678977956, now seen corresponding path program 3 times [2021-05-02 16:13:51,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:13:51,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917217239] [2021-05-02 16:13:51,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:13:51,225 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:13:51,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [483265181] [2021-05-02 16:13:51,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-02 16:13:51,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 16:13:51,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:13:51,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 16:13:51,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:13:51,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:51,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:51,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:51,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:51,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:51,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:51,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:51,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:51,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:51,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:51,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:51,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:51,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:51,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:51,364 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 16:13:51,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:13:51,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917217239] [2021-05-02 16:13:51,365 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:13:51,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483265181] [2021-05-02 16:13:51,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483265181] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:13:51,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:13:51,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 16:13:51,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603231064] [2021-05-02 16:13:51,365 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 16:13:51,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:13:51,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 16:13:51,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 16:13:51,366 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-02 16:13:51,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:13:51,435 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2021-05-02 16:13:51,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 16:13:51,435 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 50 [2021-05-02 16:13:51,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:13:51,436 INFO L225 Difference]: With dead ends: 61 [2021-05-02 16:13:51,436 INFO L226 Difference]: Without dead ends: 56 [2021-05-02 16:13:51,436 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 29.1ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-02 16:13:51,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-02 16:13:51,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-05-02 16:13:51,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 40 states have (on average 1.125) internal successors, (45), 40 states have internal predecessors, (45), 9 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 16:13:51,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2021-05-02 16:13:51,441 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 50 [2021-05-02 16:13:51,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:13:51,441 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2021-05-02 16:13:51,441 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-02 16:13:51,441 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2021-05-02 16:13:51,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-05-02 16:13:51,442 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:13:51,442 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:13:51,652 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:13:51,653 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:13:51,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:13:51,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1632159894, now seen corresponding path program 4 times [2021-05-02 16:13:51,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:13:51,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330926174] [2021-05-02 16:13:51,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:13:51,659 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:13:51,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [125019453] [2021-05-02 16:13:51,659 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-02 16:13:51,730 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 16:13:51,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:13:51,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-02 16:13:51,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:13:51,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:51,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:51,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:51,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:51,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:51,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:51,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:51,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:51,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:51,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:51,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:51,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:51,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:51,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:51,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:51,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:51,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:51,892 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 8 proven. 62 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 16:13:51,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:13:51,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330926174] [2021-05-02 16:13:51,893 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:13:51,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125019453] [2021-05-02 16:13:51,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125019453] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:13:51,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:13:51,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 16:13:51,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279689001] [2021-05-02 16:13:51,893 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 16:13:51,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:13:51,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 16:13:51,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 16:13:51,894 INFO L87 Difference]: Start difference. First operand 56 states and 61 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2021-05-02 16:13:51,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:13:51,968 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2021-05-02 16:13:51,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 16:13:51,969 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) Word has length 59 [2021-05-02 16:13:51,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:13:51,969 INFO L225 Difference]: With dead ends: 70 [2021-05-02 16:13:51,969 INFO L226 Difference]: Without dead ends: 65 [2021-05-02 16:13:51,970 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 39.1ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-05-02 16:13:51,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-05-02 16:13:51,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-05-02 16:13:51,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 47 states have (on average 1.127659574468085) internal successors, (53), 47 states have internal predecessors, (53), 10 states have call successors, (10), 9 states have call predecessors, (10), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 16:13:51,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 71 transitions. [2021-05-02 16:13:51,976 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 71 transitions. Word has length 59 [2021-05-02 16:13:51,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:13:51,976 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 71 transitions. [2021-05-02 16:13:51,976 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2021-05-02 16:13:51,976 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 71 transitions. [2021-05-02 16:13:51,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-02 16:13:51,977 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:13:51,977 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:13:52,180 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:13:52,181 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:13:52,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:13:52,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1512407140, now seen corresponding path program 5 times [2021-05-02 16:13:52,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:13:52,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740568702] [2021-05-02 16:13:52,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:13:52,187 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:13:52,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1581267605] [2021-05-02 16:13:52,188 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-02 16:13:52,287 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-02 16:13:52,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:13:52,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 16:13:52,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:13:52,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:52,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:52,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:52,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:52,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:52,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:52,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:52,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:52,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:52,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:52,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:52,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:52,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:52,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:52,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:52,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:52,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:52,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:52,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:52,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:52,429 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 10 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 16:13:52,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:13:52,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740568702] [2021-05-02 16:13:52,429 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:13:52,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581267605] [2021-05-02 16:13:52,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581267605] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:13:52,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:13:52,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 16:13:52,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316455092] [2021-05-02 16:13:52,430 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 16:13:52,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:13:52,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 16:13:52,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-02 16:13:52,431 INFO L87 Difference]: Start difference. First operand 65 states and 71 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2021-05-02 16:13:52,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:13:52,501 INFO L93 Difference]: Finished difference Result 79 states and 86 transitions. [2021-05-02 16:13:52,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 16:13:52,501 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) Word has length 68 [2021-05-02 16:13:52,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:13:52,502 INFO L225 Difference]: With dead ends: 79 [2021-05-02 16:13:52,502 INFO L226 Difference]: Without dead ends: 74 [2021-05-02 16:13:52,502 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 47.5ms TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-05-02 16:13:52,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-05-02 16:13:52,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-05-02 16:13:52,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 54 states have (on average 1.1296296296296295) internal successors, (61), 54 states have internal predecessors, (61), 11 states have call successors, (11), 10 states have call predecessors, (11), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 16:13:52,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 81 transitions. [2021-05-02 16:13:52,508 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 81 transitions. Word has length 68 [2021-05-02 16:13:52,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:13:52,508 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 81 transitions. [2021-05-02 16:13:52,508 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2021-05-02 16:13:52,508 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 81 transitions. [2021-05-02 16:13:52,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-05-02 16:13:52,509 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:13:52,509 INFO L523 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:13:52,722 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-02 16:13:52,723 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:13:52,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:13:52,723 INFO L82 PathProgramCache]: Analyzing trace with hash 771706710, now seen corresponding path program 6 times [2021-05-02 16:13:52,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:13:52,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344629860] [2021-05-02 16:13:52,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:13:52,730 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:13:52,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [818866420] [2021-05-02 16:13:52,730 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-02 16:13:52,802 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-02 16:13:52,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:13:52,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 16:13:52,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:13:52,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:52,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:52,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:52,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:52,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:52,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:52,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:52,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:52,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:52,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:52,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:52,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:52,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:52,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:52,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:52,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:52,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:52,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:52,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:52,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:52,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:52,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:52,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:52,953 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 12 proven. 147 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 16:13:52,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:13:52,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344629860] [2021-05-02 16:13:52,953 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:13:52,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818866420] [2021-05-02 16:13:52,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818866420] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:13:52,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:13:52,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 16:13:52,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859738397] [2021-05-02 16:13:52,954 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 16:13:52,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:13:52,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 16:13:52,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-02 16:13:52,954 INFO L87 Difference]: Start difference. First operand 74 states and 81 transitions. Second operand has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 9 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2021-05-02 16:13:53,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:13:53,040 INFO L93 Difference]: Finished difference Result 88 states and 96 transitions. [2021-05-02 16:13:53,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 16:13:53,041 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 9 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) Word has length 77 [2021-05-02 16:13:53,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:13:53,042 INFO L225 Difference]: With dead ends: 88 [2021-05-02 16:13:53,042 INFO L226 Difference]: Without dead ends: 83 [2021-05-02 16:13:53,042 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 59.6ms TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-05-02 16:13:53,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-05-02 16:13:53,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-05-02 16:13:53,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 61 states have (on average 1.1311475409836065) internal successors, (69), 61 states have internal predecessors, (69), 12 states have call successors, (12), 11 states have call predecessors, (12), 9 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 16:13:53,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 91 transitions. [2021-05-02 16:13:53,048 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 91 transitions. Word has length 77 [2021-05-02 16:13:53,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:13:53,048 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 91 transitions. [2021-05-02 16:13:53,048 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 9 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2021-05-02 16:13:53,048 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 91 transitions. [2021-05-02 16:13:53,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-02 16:13:53,049 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:13:53,049 INFO L523 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:13:53,266 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:13:53,266 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:13:53,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:13:53,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1848611036, now seen corresponding path program 7 times [2021-05-02 16:13:53,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:13:53,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920619347] [2021-05-02 16:13:53,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:13:53,273 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:13:53,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1585747855] [2021-05-02 16:13:53,273 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-02 16:13:53,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:13:53,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 16:13:53,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:13:53,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:53,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:53,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:53,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:53,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:53,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:53,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:53,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:53,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:53,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:53,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:53,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:53,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:53,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:53,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:53,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:53,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:53,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:53,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:53,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:53,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:53,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:53,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:53,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:53,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:53,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:53,531 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 14 proven. 203 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 16:13:53,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:13:53,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920619347] [2021-05-02 16:13:53,531 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:13:53,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585747855] [2021-05-02 16:13:53,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585747855] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:13:53,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:13:53,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 16:13:53,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590133081] [2021-05-02 16:13:53,532 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 16:13:53,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:13:53,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 16:13:53,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-02 16:13:53,533 INFO L87 Difference]: Start difference. First operand 83 states and 91 transitions. Second operand has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 10 states have internal predecessors, (61), 10 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2021-05-02 16:13:53,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:13:53,637 INFO L93 Difference]: Finished difference Result 97 states and 106 transitions. [2021-05-02 16:13:53,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 16:13:53,637 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 10 states have internal predecessors, (61), 10 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) Word has length 86 [2021-05-02 16:13:53,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:13:53,638 INFO L225 Difference]: With dead ends: 97 [2021-05-02 16:13:53,638 INFO L226 Difference]: Without dead ends: 92 [2021-05-02 16:13:53,639 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 89.9ms TimeCoverageRelationStatistics Valid=117, Invalid=189, Unknown=0, NotChecked=0, Total=306 [2021-05-02 16:13:53,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-05-02 16:13:53,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2021-05-02 16:13:53,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 68 states have (on average 1.1323529411764706) internal successors, (77), 68 states have internal predecessors, (77), 13 states have call successors, (13), 12 states have call predecessors, (13), 10 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 16:13:53,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 101 transitions. [2021-05-02 16:13:53,645 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 101 transitions. Word has length 86 [2021-05-02 16:13:53,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:13:53,645 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 101 transitions. [2021-05-02 16:13:53,645 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 10 states have internal predecessors, (61), 10 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2021-05-02 16:13:53,645 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 101 transitions. [2021-05-02 16:13:53,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-05-02 16:13:53,646 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:13:53,646 INFO L523 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:13:53,860 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:13:53,861 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:13:53,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:13:53,861 INFO L82 PathProgramCache]: Analyzing trace with hash -399923690, now seen corresponding path program 8 times [2021-05-02 16:13:53,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:13:53,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164995889] [2021-05-02 16:13:53,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:13:53,867 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:13:53,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [680447724] [2021-05-02 16:13:53,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:13:53,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 16:13:53,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:13:53,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 16:13:53,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:13:53,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:53,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:53,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:53,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:53,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:53,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:53,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:53,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:53,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:53,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:53,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:53,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:53,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:53,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:53,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:54,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:54,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:54,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:54,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:54,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:54,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:54,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:54,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:54,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:54,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:54,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:54,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:54,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:54,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:54,119 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 16 proven. 268 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 16:13:54,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:13:54,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164995889] [2021-05-02 16:13:54,119 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:13:54,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680447724] [2021-05-02 16:13:54,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680447724] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:13:54,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:13:54,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 16:13:54,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439871086] [2021-05-02 16:13:54,120 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 16:13:54,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:13:54,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 16:13:54,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-02 16:13:54,120 INFO L87 Difference]: Start difference. First operand 92 states and 101 transitions. Second operand has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 11 states have internal predecessors, (68), 11 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) [2021-05-02 16:13:54,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:13:54,254 INFO L93 Difference]: Finished difference Result 106 states and 116 transitions. [2021-05-02 16:13:54,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-02 16:13:54,255 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 11 states have internal predecessors, (68), 11 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) Word has length 95 [2021-05-02 16:13:54,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:13:54,256 INFO L225 Difference]: With dead ends: 106 [2021-05-02 16:13:54,256 INFO L226 Difference]: Without dead ends: 101 [2021-05-02 16:13:54,256 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 94.7ms TimeCoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2021-05-02 16:13:54,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-05-02 16:13:54,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2021-05-02 16:13:54,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 75 states have (on average 1.1333333333333333) internal successors, (85), 75 states have internal predecessors, (85), 14 states have call successors, (14), 13 states have call predecessors, (14), 11 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 16:13:54,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 111 transitions. [2021-05-02 16:13:54,261 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 111 transitions. Word has length 95 [2021-05-02 16:13:54,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:13:54,262 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 111 transitions. [2021-05-02 16:13:54,262 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 11 states have internal predecessors, (68), 11 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) [2021-05-02 16:13:54,262 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 111 transitions. [2021-05-02 16:13:54,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-02 16:13:54,263 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:13:54,263 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:13:54,478 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-02 16:13:54,478 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:13:54,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:13:54,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1717228060, now seen corresponding path program 9 times [2021-05-02 16:13:54,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:13:54,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394085154] [2021-05-02 16:13:54,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:13:54,484 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:13:54,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [488276548] [2021-05-02 16:13:54,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:13:54,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-05-02 16:13:54,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:13:54,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 16:13:54,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:13:54,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:54,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:54,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:54,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:54,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:54,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:54,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:54,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:54,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:54,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:54,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:54,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:54,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:54,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:54,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:54,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:54,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:54,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:54,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:54,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:54,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:54,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:54,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:54,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:54,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:54,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:54,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:54,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:54,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:54,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:54,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:54,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:54,748 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 18 proven. 342 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 16:13:54,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:13:54,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394085154] [2021-05-02 16:13:54,748 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:13:54,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488276548] [2021-05-02 16:13:54,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488276548] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:13:54,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:13:54,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 16:13:54,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126486586] [2021-05-02 16:13:54,750 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 16:13:54,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:13:54,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 16:13:54,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-02 16:13:54,751 INFO L87 Difference]: Start difference. First operand 101 states and 111 transitions. Second operand has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 12 states have internal predecessors, (75), 12 states have call successors, (14), 12 states have call predecessors, (14), 10 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2021-05-02 16:13:54,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:13:54,905 INFO L93 Difference]: Finished difference Result 115 states and 126 transitions. [2021-05-02 16:13:54,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-02 16:13:54,905 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 12 states have internal predecessors, (75), 12 states have call successors, (14), 12 states have call predecessors, (14), 10 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) Word has length 104 [2021-05-02 16:13:54,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:13:54,906 INFO L225 Difference]: With dead ends: 115 [2021-05-02 16:13:54,906 INFO L226 Difference]: Without dead ends: 110 [2021-05-02 16:13:54,906 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 123.9ms TimeCoverageRelationStatistics Valid=176, Invalid=286, Unknown=0, NotChecked=0, Total=462 [2021-05-02 16:13:54,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-05-02 16:13:54,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2021-05-02 16:13:54,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 82 states have (on average 1.1341463414634145) internal successors, (93), 82 states have internal predecessors, (93), 15 states have call successors, (15), 14 states have call predecessors, (15), 12 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 16:13:54,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 121 transitions. [2021-05-02 16:13:54,912 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 121 transitions. Word has length 104 [2021-05-02 16:13:54,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:13:54,912 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 121 transitions. [2021-05-02 16:13:54,912 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 12 states have internal predecessors, (75), 12 states have call successors, (14), 12 states have call predecessors, (14), 10 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2021-05-02 16:13:54,913 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 121 transitions. [2021-05-02 16:13:54,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-05-02 16:13:54,913 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:13:54,913 INFO L523 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:13:55,130 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-02 16:13:55,130 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:13:55,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:13:55,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1468805930, now seen corresponding path program 10 times [2021-05-02 16:13:55,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:13:55,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015430327] [2021-05-02 16:13:55,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:13:55,136 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:13:55,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1646733803] [2021-05-02 16:13:55,136 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:13:55,205 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 16:13:55,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:13:55,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 16:13:55,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:13:55,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:55,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:55,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:55,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:55,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:55,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:55,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:55,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:55,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:55,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:55,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:55,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:55,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:55,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:55,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:55,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:55,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:55,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:55,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:55,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:55,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:55,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:55,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:55,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:55,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:55,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:55,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:55,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:55,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:55,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:55,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:55,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:55,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:55,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:55,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:55,426 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 20 proven. 425 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 16:13:55,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:13:55,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015430327] [2021-05-02 16:13:55,426 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:13:55,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646733803] [2021-05-02 16:13:55,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646733803] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:13:55,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:13:55,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 16:13:55,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611808124] [2021-05-02 16:13:55,427 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 16:13:55,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:13:55,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 16:13:55,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-05-02 16:13:55,427 INFO L87 Difference]: Start difference. First operand 110 states and 121 transitions. Second operand has 14 states, 14 states have (on average 5.857142857142857) internal successors, (82), 13 states have internal predecessors, (82), 13 states have call successors, (15), 13 states have call predecessors, (15), 11 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2021-05-02 16:13:55,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:13:55,571 INFO L93 Difference]: Finished difference Result 124 states and 136 transitions. [2021-05-02 16:13:55,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-02 16:13:55,572 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.857142857142857) internal successors, (82), 13 states have internal predecessors, (82), 13 states have call successors, (15), 13 states have call predecessors, (15), 11 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) Word has length 113 [2021-05-02 16:13:55,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:13:55,572 INFO L225 Difference]: With dead ends: 124 [2021-05-02 16:13:55,572 INFO L226 Difference]: Without dead ends: 119 [2021-05-02 16:13:55,573 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 135.1ms TimeCoverageRelationStatistics Valid=210, Invalid=342, Unknown=0, NotChecked=0, Total=552 [2021-05-02 16:13:55,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-05-02 16:13:55,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2021-05-02 16:13:55,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 89 states have (on average 1.1348314606741574) internal successors, (101), 89 states have internal predecessors, (101), 16 states have call successors, (16), 15 states have call predecessors, (16), 13 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 16:13:55,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 131 transitions. [2021-05-02 16:13:55,579 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 131 transitions. Word has length 113 [2021-05-02 16:13:55,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:13:55,579 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 131 transitions. [2021-05-02 16:13:55,579 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.857142857142857) internal successors, (82), 13 states have internal predecessors, (82), 13 states have call successors, (15), 13 states have call predecessors, (15), 11 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2021-05-02 16:13:55,579 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 131 transitions. [2021-05-02 16:13:55,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-05-02 16:13:55,580 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:13:55,580 INFO L523 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:13:55,795 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 16:13:55,795 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:13:55,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:13:55,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1999651676, now seen corresponding path program 11 times [2021-05-02 16:13:55,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:13:55,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555035318] [2021-05-02 16:13:55,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:13:55,802 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:13:55,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [486949674] [2021-05-02 16:13:55,802 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:13:55,877 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-05-02 16:13:55,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:13:55,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 16:13:55,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:13:55,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:55,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:55,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:55,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:55,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:55,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:55,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:55,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:55,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:55,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:55,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:55,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:55,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:55,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:55,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:55,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:55,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:55,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:55,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:55,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:55,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:56,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:56,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:56,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:56,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:56,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:56,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:56,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:56,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:56,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:56,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:56,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:56,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:56,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:56,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:56,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:56,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:56,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:56,102 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 22 proven. 517 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 16:13:56,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:13:56,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555035318] [2021-05-02 16:13:56,103 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:13:56,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486949674] [2021-05-02 16:13:56,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486949674] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:13:56,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:13:56,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 16:13:56,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463874311] [2021-05-02 16:13:56,103 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 16:13:56,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:13:56,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 16:13:56,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-05-02 16:13:56,104 INFO L87 Difference]: Start difference. First operand 119 states and 131 transitions. Second operand has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 14 states have internal predecessors, (89), 14 states have call successors, (16), 14 states have call predecessors, (16), 12 states have return successors, (14), 12 states have call predecessors, (14), 13 states have call successors, (14) [2021-05-02 16:13:56,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:13:56,289 INFO L93 Difference]: Finished difference Result 133 states and 146 transitions. [2021-05-02 16:13:56,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-02 16:13:56,289 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 14 states have internal predecessors, (89), 14 states have call successors, (16), 14 states have call predecessors, (16), 12 states have return successors, (14), 12 states have call predecessors, (14), 13 states have call successors, (14) Word has length 122 [2021-05-02 16:13:56,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:13:56,290 INFO L225 Difference]: With dead ends: 133 [2021-05-02 16:13:56,290 INFO L226 Difference]: Without dead ends: 128 [2021-05-02 16:13:56,292 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 151.8ms TimeCoverageRelationStatistics Valid=247, Invalid=403, Unknown=0, NotChecked=0, Total=650 [2021-05-02 16:13:56,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-05-02 16:13:56,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2021-05-02 16:13:56,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 96 states have (on average 1.1354166666666667) internal successors, (109), 96 states have internal predecessors, (109), 17 states have call successors, (17), 16 states have call predecessors, (17), 14 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 16:13:56,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 141 transitions. [2021-05-02 16:13:56,311 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 141 transitions. Word has length 122 [2021-05-02 16:13:56,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:13:56,311 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 141 transitions. [2021-05-02 16:13:56,311 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 14 states have internal predecessors, (89), 14 states have call successors, (16), 14 states have call predecessors, (16), 12 states have return successors, (14), 12 states have call predecessors, (14), 13 states have call successors, (14) [2021-05-02 16:13:56,311 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 141 transitions. [2021-05-02 16:13:56,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-05-02 16:13:56,313 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:13:56,313 INFO L523 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:13:56,526 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:13:56,526 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:13:56,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:13:56,526 INFO L82 PathProgramCache]: Analyzing trace with hash 881443734, now seen corresponding path program 12 times [2021-05-02 16:13:56,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:13:56,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604542182] [2021-05-02 16:13:56,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:13:56,532 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:13:56,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1049651939] [2021-05-02 16:13:56,532 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:13:56,616 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-05-02 16:13:56,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:13:56,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-02 16:13:56,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:13:56,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:56,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:56,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:56,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:56,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:56,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:56,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:56,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:56,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:56,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:56,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:56,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:56,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:56,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:56,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:56,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:56,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:56,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:56,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:56,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:56,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:56,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:56,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:56,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:56,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:56,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:56,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:56,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:56,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:56,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:56,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:56,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:56,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:56,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:56,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:56,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:56,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:56,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:56,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:56,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:56,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:56,868 INFO L134 CoverageAnalysis]: Checked inductivity of 646 backedges. 24 proven. 618 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 16:13:56,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:13:56,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604542182] [2021-05-02 16:13:56,868 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:13:56,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049651939] [2021-05-02 16:13:56,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049651939] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:13:56,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:13:56,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-02 16:13:56,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422293601] [2021-05-02 16:13:56,869 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 16:13:56,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:13:56,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 16:13:56,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-05-02 16:13:56,869 INFO L87 Difference]: Start difference. First operand 128 states and 141 transitions. Second operand has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 states have internal predecessors, (96), 15 states have call successors, (17), 15 states have call predecessors, (17), 13 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) [2021-05-02 16:13:57,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:13:57,031 INFO L93 Difference]: Finished difference Result 142 states and 156 transitions. [2021-05-02 16:13:57,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-02 16:13:57,031 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 states have internal predecessors, (96), 15 states have call successors, (17), 15 states have call predecessors, (17), 13 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) Word has length 131 [2021-05-02 16:13:57,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:13:57,032 INFO L225 Difference]: With dead ends: 142 [2021-05-02 16:13:57,032 INFO L226 Difference]: Without dead ends: 137 [2021-05-02 16:13:57,032 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 158.0ms TimeCoverageRelationStatistics Valid=287, Invalid=469, Unknown=0, NotChecked=0, Total=756 [2021-05-02 16:13:57,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-05-02 16:13:57,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2021-05-02 16:13:57,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 103 states have (on average 1.1359223300970873) internal successors, (117), 103 states have internal predecessors, (117), 18 states have call successors, (18), 17 states have call predecessors, (18), 15 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 16:13:57,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 151 transitions. [2021-05-02 16:13:57,038 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 151 transitions. Word has length 131 [2021-05-02 16:13:57,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:13:57,038 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 151 transitions. [2021-05-02 16:13:57,038 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 states have internal predecessors, (96), 15 states have call successors, (17), 15 states have call predecessors, (17), 13 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) [2021-05-02 16:13:57,038 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 151 transitions. [2021-05-02 16:13:57,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-05-02 16:13:57,039 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:13:57,039 INFO L523 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 13, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:13:57,252 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 16:13:57,253 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:13:57,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:13:57,253 INFO L82 PathProgramCache]: Analyzing trace with hash 2089018524, now seen corresponding path program 13 times [2021-05-02 16:13:57,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:13:57,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226433560] [2021-05-02 16:13:57,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:13:57,267 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:13:57,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2036338772] [2021-05-02 16:13:57,267 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:13:57,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:13:57,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 16:13:57,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:13:57,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:57,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:57,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:57,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:57,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:57,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:57,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:57,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:57,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:57,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:57,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:57,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:57,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:57,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:57,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:57,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:57,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:57,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:57,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:57,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:57,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:57,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:57,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:57,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:57,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:57,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:57,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:57,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:57,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:57,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:57,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:57,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:57,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:57,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:57,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:57,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:57,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:57,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:57,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:57,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:57,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:57,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:57,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:57,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:57,603 INFO L134 CoverageAnalysis]: Checked inductivity of 758 backedges. 26 proven. 728 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 16:13:57,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:13:57,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226433560] [2021-05-02 16:13:57,604 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:13:57,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036338772] [2021-05-02 16:13:57,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036338772] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:13:57,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:13:57,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-02 16:13:57,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258756833] [2021-05-02 16:13:57,604 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 16:13:57,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:13:57,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 16:13:57,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2021-05-02 16:13:57,605 INFO L87 Difference]: Start difference. First operand 137 states and 151 transitions. Second operand has 17 states, 17 states have (on average 6.0588235294117645) internal successors, (103), 16 states have internal predecessors, (103), 16 states have call successors, (18), 16 states have call predecessors, (18), 14 states have return successors, (16), 14 states have call predecessors, (16), 15 states have call successors, (16) [2021-05-02 16:13:57,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:13:57,814 INFO L93 Difference]: Finished difference Result 151 states and 166 transitions. [2021-05-02 16:13:57,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-02 16:13:57,815 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 6.0588235294117645) internal successors, (103), 16 states have internal predecessors, (103), 16 states have call successors, (18), 16 states have call predecessors, (18), 14 states have return successors, (16), 14 states have call predecessors, (16), 15 states have call successors, (16) Word has length 140 [2021-05-02 16:13:57,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:13:57,815 INFO L225 Difference]: With dead ends: 151 [2021-05-02 16:13:57,816 INFO L226 Difference]: Without dead ends: 146 [2021-05-02 16:13:57,816 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 203.1ms TimeCoverageRelationStatistics Valid=330, Invalid=540, Unknown=0, NotChecked=0, Total=870 [2021-05-02 16:13:57,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-05-02 16:13:57,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2021-05-02 16:13:57,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 110 states have (on average 1.1363636363636365) internal successors, (125), 110 states have internal predecessors, (125), 19 states have call successors, (19), 18 states have call predecessors, (19), 16 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 16:13:57,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 161 transitions. [2021-05-02 16:13:57,821 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 161 transitions. Word has length 140 [2021-05-02 16:13:57,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:13:57,821 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 161 transitions. [2021-05-02 16:13:57,822 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 6.0588235294117645) internal successors, (103), 16 states have internal predecessors, (103), 16 states have call successors, (18), 16 states have call predecessors, (18), 14 states have return successors, (16), 14 states have call predecessors, (16), 15 states have call successors, (16) [2021-05-02 16:13:57,822 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 161 transitions. [2021-05-02 16:13:57,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-05-02 16:13:57,822 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:13:57,822 INFO L523 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 14, 14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:13:58,036 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-02 16:13:58,037 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:13:58,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:13:58,037 INFO L82 PathProgramCache]: Analyzing trace with hash -1088976298, now seen corresponding path program 14 times [2021-05-02 16:13:58,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:13:58,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080360120] [2021-05-02 16:13:58,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:13:58,048 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:13:58,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [825389110] [2021-05-02 16:13:58,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:13:58,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 16:13:58,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:13:58,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 16:13:58,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:13:58,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:58,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:58,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:58,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:58,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:58,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:58,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:58,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:58,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:58,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:58,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:58,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:58,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:58,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:58,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:58,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:58,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:58,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:58,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:58,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:58,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:58,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:58,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:58,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:58,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:58,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:58,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:58,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:58,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:58,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:58,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:58,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:58,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:58,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:58,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:58,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:58,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:58,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:58,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:58,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:58,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:58,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:58,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:58,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:58,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:58,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:58,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:58,392 INFO L134 CoverageAnalysis]: Checked inductivity of 879 backedges. 28 proven. 847 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 16:13:58,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:13:58,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080360120] [2021-05-02 16:13:58,392 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:13:58,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825389110] [2021-05-02 16:13:58,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825389110] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:13:58,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:13:58,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-02 16:13:58,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082640083] [2021-05-02 16:13:58,395 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 16:13:58,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:13:58,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 16:13:58,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2021-05-02 16:13:58,396 INFO L87 Difference]: Start difference. First operand 146 states and 161 transitions. Second operand has 18 states, 18 states have (on average 6.111111111111111) internal successors, (110), 17 states have internal predecessors, (110), 17 states have call successors, (19), 17 states have call predecessors, (19), 15 states have return successors, (17), 15 states have call predecessors, (17), 16 states have call successors, (17) [2021-05-02 16:13:58,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:13:58,586 INFO L93 Difference]: Finished difference Result 160 states and 176 transitions. [2021-05-02 16:13:58,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-02 16:13:58,586 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 6.111111111111111) internal successors, (110), 17 states have internal predecessors, (110), 17 states have call successors, (19), 17 states have call predecessors, (19), 15 states have return successors, (17), 15 states have call predecessors, (17), 16 states have call successors, (17) Word has length 149 [2021-05-02 16:13:58,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:13:58,587 INFO L225 Difference]: With dead ends: 160 [2021-05-02 16:13:58,587 INFO L226 Difference]: Without dead ends: 155 [2021-05-02 16:13:58,588 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 200.7ms TimeCoverageRelationStatistics Valid=376, Invalid=616, Unknown=0, NotChecked=0, Total=992 [2021-05-02 16:13:58,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-05-02 16:13:58,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2021-05-02 16:13:58,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 117 states have (on average 1.1367521367521367) internal successors, (133), 117 states have internal predecessors, (133), 20 states have call successors, (20), 19 states have call predecessors, (20), 17 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-02 16:13:58,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 171 transitions. [2021-05-02 16:13:58,593 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 171 transitions. Word has length 149 [2021-05-02 16:13:58,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:13:58,594 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 171 transitions. [2021-05-02 16:13:58,594 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 6.111111111111111) internal successors, (110), 17 states have internal predecessors, (110), 17 states have call successors, (19), 17 states have call predecessors, (19), 15 states have return successors, (17), 15 states have call predecessors, (17), 16 states have call successors, (17) [2021-05-02 16:13:58,594 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 171 transitions. [2021-05-02 16:13:58,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-05-02 16:13:58,594 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:13:58,594 INFO L523 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 15, 15, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:13:58,810 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-02 16:13:58,810 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:13:58,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:13:58,810 INFO L82 PathProgramCache]: Analyzing trace with hash -2060864036, now seen corresponding path program 15 times [2021-05-02 16:13:58,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:13:58,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606665229] [2021-05-02 16:13:58,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:13:58,816 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:13:58,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1220898457] [2021-05-02 16:13:58,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:13:58,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-05-02 16:13:58,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:13:58,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-02 16:13:58,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:13:58,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:58,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:58,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:58,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:58,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:58,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:58,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:58,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:58,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:58,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:58,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:58,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:58,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:58,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:58,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:58,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:58,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:58,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:59,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:59,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:59,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:59,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:59,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:59,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:59,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:59,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:59,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:59,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:59,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:59,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:59,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:59,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:59,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:59,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:59,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:59,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:59,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:59,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:59,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:59,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:59,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:59,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:59,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:59,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:59,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:59,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:59,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:59,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:59,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:59,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:59,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 30 proven. 975 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 16:13:59,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:13:59,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606665229] [2021-05-02 16:13:59,236 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:13:59,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220898457] [2021-05-02 16:13:59,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220898457] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:13:59,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:13:59,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-05-02 16:13:59,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374093116] [2021-05-02 16:13:59,237 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-02 16:13:59,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:13:59,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-02 16:13:59,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2021-05-02 16:13:59,239 INFO L87 Difference]: Start difference. First operand 155 states and 171 transitions. Second operand has 19 states, 19 states have (on average 6.157894736842105) internal successors, (117), 18 states have internal predecessors, (117), 18 states have call successors, (20), 18 states have call predecessors, (20), 16 states have return successors, (18), 16 states have call predecessors, (18), 17 states have call successors, (18) [2021-05-02 16:13:59,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:13:59,498 INFO L93 Difference]: Finished difference Result 169 states and 186 transitions. [2021-05-02 16:13:59,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-02 16:13:59,499 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 6.157894736842105) internal successors, (117), 18 states have internal predecessors, (117), 18 states have call successors, (20), 18 states have call predecessors, (20), 16 states have return successors, (18), 16 states have call predecessors, (18), 17 states have call successors, (18) Word has length 158 [2021-05-02 16:13:59,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:13:59,500 INFO L225 Difference]: With dead ends: 169 [2021-05-02 16:13:59,500 INFO L226 Difference]: Without dead ends: 164 [2021-05-02 16:13:59,500 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 243.5ms TimeCoverageRelationStatistics Valid=425, Invalid=697, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 16:13:59,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-05-02 16:13:59,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2021-05-02 16:13:59,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 124 states have (on average 1.1370967741935485) internal successors, (141), 124 states have internal predecessors, (141), 21 states have call successors, (21), 20 states have call predecessors, (21), 18 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-02 16:13:59,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 181 transitions. [2021-05-02 16:13:59,506 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 181 transitions. Word has length 158 [2021-05-02 16:13:59,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:13:59,506 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 181 transitions. [2021-05-02 16:13:59,506 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 6.157894736842105) internal successors, (117), 18 states have internal predecessors, (117), 18 states have call successors, (20), 18 states have call predecessors, (20), 16 states have return successors, (18), 16 states have call predecessors, (18), 17 states have call successors, (18) [2021-05-02 16:13:59,506 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 181 transitions. [2021-05-02 16:13:59,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-05-02 16:13:59,507 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:13:59,507 INFO L523 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 16, 16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:13:59,712 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:13:59,713 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:13:59,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:13:59,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1479991018, now seen corresponding path program 16 times [2021-05-02 16:13:59,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:13:59,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98538728] [2021-05-02 16:13:59,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:13:59,718 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:13:59,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1816294094] [2021-05-02 16:13:59,718 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:13:59,792 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 16:13:59,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:13:59,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 16:13:59,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:13:59,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:59,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:59,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:59,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:59,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:59,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:59,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:59,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:59,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:59,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:59,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:59,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:59,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:59,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:59,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:59,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:59,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:59,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:59,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:59,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:59,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:59,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:59,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:59,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:59,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:59,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:59,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:59,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:59,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:59,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:59,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:59,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:13:59,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:00,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:00,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:00,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:00,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:00,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:00,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:00,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:00,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:00,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:00,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:00,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:00,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:00,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:00,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:00,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:00,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:00,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:00,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:00,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:00,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:00,144 INFO L134 CoverageAnalysis]: Checked inductivity of 1148 backedges. 32 proven. 1112 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 16:14:00,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:14:00,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98538728] [2021-05-02 16:14:00,144 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:14:00,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816294094] [2021-05-02 16:14:00,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816294094] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:14:00,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:14:00,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-05-02 16:14:00,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391301416] [2021-05-02 16:14:00,145 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 16:14:00,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:14:00,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 16:14:00,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2021-05-02 16:14:00,146 INFO L87 Difference]: Start difference. First operand 164 states and 181 transitions. Second operand has 20 states, 20 states have (on average 6.2) internal successors, (124), 19 states have internal predecessors, (124), 19 states have call successors, (21), 19 states have call predecessors, (21), 17 states have return successors, (19), 17 states have call predecessors, (19), 18 states have call successors, (19) [2021-05-02 16:14:00,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:14:00,401 INFO L93 Difference]: Finished difference Result 178 states and 196 transitions. [2021-05-02 16:14:00,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-02 16:14:00,401 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 6.2) internal successors, (124), 19 states have internal predecessors, (124), 19 states have call successors, (21), 19 states have call predecessors, (21), 17 states have return successors, (19), 17 states have call predecessors, (19), 18 states have call successors, (19) Word has length 167 [2021-05-02 16:14:00,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:14:00,402 INFO L225 Difference]: With dead ends: 178 [2021-05-02 16:14:00,402 INFO L226 Difference]: Without dead ends: 173 [2021-05-02 16:14:00,403 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 288.3ms TimeCoverageRelationStatistics Valid=477, Invalid=783, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 16:14:00,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-05-02 16:14:00,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2021-05-02 16:14:00,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 131 states have (on average 1.1374045801526718) internal successors, (149), 131 states have internal predecessors, (149), 22 states have call successors, (22), 21 states have call predecessors, (22), 19 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-02 16:14:00,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 191 transitions. [2021-05-02 16:14:00,408 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 191 transitions. Word has length 167 [2021-05-02 16:14:00,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:14:00,409 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 191 transitions. [2021-05-02 16:14:00,409 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 6.2) internal successors, (124), 19 states have internal predecessors, (124), 19 states have call successors, (21), 19 states have call predecessors, (21), 17 states have return successors, (19), 17 states have call predecessors, (19), 18 states have call successors, (19) [2021-05-02 16:14:00,409 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 191 transitions. [2021-05-02 16:14:00,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-05-02 16:14:00,410 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:14:00,410 INFO L523 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 17, 17, 17, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:14:00,625 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:14:00,625 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:14:00,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:14:00,625 INFO L82 PathProgramCache]: Analyzing trace with hash 318093084, now seen corresponding path program 17 times [2021-05-02 16:14:00,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:14:00,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229304906] [2021-05-02 16:14:00,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:14:00,633 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:14:00,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [637907084] [2021-05-02 16:14:00,633 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:14:00,719 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-05-02 16:14:00,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:14:00,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-02 16:14:00,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:14:00,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:00,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:00,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:00,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:00,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:00,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:00,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:00,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:00,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:00,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:00,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:00,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:00,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:00,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:00,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:00,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:00,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:00,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:00,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:00,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:00,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:00,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:00,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:00,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:00,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:00,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:00,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:00,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:00,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:00,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:00,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:00,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:00,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:00,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:00,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:00,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:00,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:00,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:00,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:00,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:00,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:00,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:00,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:00,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:00,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:01,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:01,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:01,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:01,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:01,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:01,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:01,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:01,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:01,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:01,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:01,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:01,090 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 34 proven. 1258 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 16:14:01,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:14:01,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229304906] [2021-05-02 16:14:01,091 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:14:01,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637907084] [2021-05-02 16:14:01,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637907084] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:14:01,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:14:01,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-05-02 16:14:01,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106549245] [2021-05-02 16:14:01,091 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-02 16:14:01,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:14:01,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-02 16:14:01,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2021-05-02 16:14:01,092 INFO L87 Difference]: Start difference. First operand 173 states and 191 transitions. Second operand has 21 states, 21 states have (on average 6.238095238095238) internal successors, (131), 20 states have internal predecessors, (131), 20 states have call successors, (22), 20 states have call predecessors, (22), 18 states have return successors, (20), 18 states have call predecessors, (20), 19 states have call successors, (20) [2021-05-02 16:14:01,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:14:01,394 INFO L93 Difference]: Finished difference Result 187 states and 206 transitions. [2021-05-02 16:14:01,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-02 16:14:01,394 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 6.238095238095238) internal successors, (131), 20 states have internal predecessors, (131), 20 states have call successors, (22), 20 states have call predecessors, (22), 18 states have return successors, (20), 18 states have call predecessors, (20), 19 states have call successors, (20) Word has length 176 [2021-05-02 16:14:01,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:14:01,395 INFO L225 Difference]: With dead ends: 187 [2021-05-02 16:14:01,395 INFO L226 Difference]: Without dead ends: 182 [2021-05-02 16:14:01,396 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 315.1ms TimeCoverageRelationStatistics Valid=532, Invalid=874, Unknown=0, NotChecked=0, Total=1406 [2021-05-02 16:14:01,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-05-02 16:14:01,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2021-05-02 16:14:01,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 138 states have (on average 1.1376811594202898) internal successors, (157), 138 states have internal predecessors, (157), 23 states have call successors, (23), 22 states have call predecessors, (23), 20 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 16:14:01,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 201 transitions. [2021-05-02 16:14:01,406 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 201 transitions. Word has length 176 [2021-05-02 16:14:01,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:14:01,406 INFO L480 AbstractCegarLoop]: Abstraction has 182 states and 201 transitions. [2021-05-02 16:14:01,407 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 6.238095238095238) internal successors, (131), 20 states have internal predecessors, (131), 20 states have call successors, (22), 20 states have call predecessors, (22), 18 states have return successors, (20), 18 states have call predecessors, (20), 19 states have call successors, (20) [2021-05-02 16:14:01,407 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 201 transitions. [2021-05-02 16:14:01,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-05-02 16:14:01,408 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:14:01,408 INFO L523 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 18, 18, 18, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:14:01,626 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-02 16:14:01,627 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:14:01,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:14:01,627 INFO L82 PathProgramCache]: Analyzing trace with hash 994740182, now seen corresponding path program 18 times [2021-05-02 16:14:01,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:14:01,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819402158] [2021-05-02 16:14:01,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:14:01,635 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:14:01,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1497915729] [2021-05-02 16:14:01,635 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:14:01,749 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-05-02 16:14:01,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:14:01,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-02 16:14:01,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:14:01,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:01,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:01,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:01,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:01,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:01,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:01,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:01,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:01,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:01,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:01,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:01,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:01,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:01,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:01,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:01,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:01,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:01,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:01,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:01,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:01,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:01,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:01,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:01,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:01,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:01,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:01,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:01,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:01,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:01,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:01,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:01,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:01,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:01,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:01,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:01,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:01,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:01,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:01,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:01,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:01,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:01,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:02,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:02,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:02,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:02,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:02,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:02,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:02,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:02,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:02,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:02,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:02,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:02,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:02,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:02,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:02,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:02,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:02,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:02,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 36 proven. 1413 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 16:14:02,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:14:02,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819402158] [2021-05-02 16:14:02,134 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:14:02,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497915729] [2021-05-02 16:14:02,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497915729] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:14:02,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:14:02,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-05-02 16:14:02,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058677551] [2021-05-02 16:14:02,135 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 16:14:02,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:14:02,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 16:14:02,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2021-05-02 16:14:02,135 INFO L87 Difference]: Start difference. First operand 182 states and 201 transitions. Second operand has 22 states, 22 states have (on average 6.2727272727272725) internal successors, (138), 21 states have internal predecessors, (138), 21 states have call successors, (23), 21 states have call predecessors, (23), 19 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) [2021-05-02 16:14:02,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:14:02,441 INFO L93 Difference]: Finished difference Result 196 states and 216 transitions. [2021-05-02 16:14:02,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-02 16:14:02,442 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 6.2727272727272725) internal successors, (138), 21 states have internal predecessors, (138), 21 states have call successors, (23), 21 states have call predecessors, (23), 19 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) Word has length 185 [2021-05-02 16:14:02,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:14:02,444 INFO L225 Difference]: With dead ends: 196 [2021-05-02 16:14:02,444 INFO L226 Difference]: Without dead ends: 191 [2021-05-02 16:14:02,444 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 347.5ms TimeCoverageRelationStatistics Valid=590, Invalid=970, Unknown=0, NotChecked=0, Total=1560 [2021-05-02 16:14:02,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-05-02 16:14:02,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2021-05-02 16:14:02,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 145 states have (on average 1.1379310344827587) internal successors, (165), 145 states have internal predecessors, (165), 24 states have call successors, (24), 23 states have call predecessors, (24), 21 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-05-02 16:14:02,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 211 transitions. [2021-05-02 16:14:02,450 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 211 transitions. Word has length 185 [2021-05-02 16:14:02,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:14:02,450 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 211 transitions. [2021-05-02 16:14:02,451 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 6.2727272727272725) internal successors, (138), 21 states have internal predecessors, (138), 21 states have call successors, (23), 21 states have call predecessors, (23), 19 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) [2021-05-02 16:14:02,451 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 211 transitions. [2021-05-02 16:14:02,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-05-02 16:14:02,451 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:14:02,451 INFO L523 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 19, 19, 19, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:14:02,660 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-02 16:14:02,661 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:14:02,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:14:02,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1522264156, now seen corresponding path program 19 times [2021-05-02 16:14:02,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:14:02,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971422783] [2021-05-02 16:14:02,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:14:02,666 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:14:02,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1665163423] [2021-05-02 16:14:02,667 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:14:02,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:14:02,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-02 16:14:02,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:14:02,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:02,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:02,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:02,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:02,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:02,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:02,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:02,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:02,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:02,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:02,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:02,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:02,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:02,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:02,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:02,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:02,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:02,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:02,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:02,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:02,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:02,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:02,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:02,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:02,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:02,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:02,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:02,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:02,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:02,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:02,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:02,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:02,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:02,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:02,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:02,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:02,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:02,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:02,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:02,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:02,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:02,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:03,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:03,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:03,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:03,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:03,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:03,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:03,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:03,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:03,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:03,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:03,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:03,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:03,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:03,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:03,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:03,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:03,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:03,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:03,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:03,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:03,155 INFO L134 CoverageAnalysis]: Checked inductivity of 1619 backedges. 38 proven. 1577 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 16:14:03,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:14:03,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971422783] [2021-05-02 16:14:03,156 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:14:03,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665163423] [2021-05-02 16:14:03,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665163423] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:14:03,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:14:03,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-05-02 16:14:03,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463946324] [2021-05-02 16:14:03,156 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-02 16:14:03,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:14:03,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-02 16:14:03,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2021-05-02 16:14:03,157 INFO L87 Difference]: Start difference. First operand 191 states and 211 transitions. Second operand has 23 states, 23 states have (on average 6.304347826086956) internal successors, (145), 22 states have internal predecessors, (145), 22 states have call successors, (24), 22 states have call predecessors, (24), 20 states have return successors, (22), 20 states have call predecessors, (22), 21 states have call successors, (22) [2021-05-02 16:14:03,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:14:03,469 INFO L93 Difference]: Finished difference Result 205 states and 226 transitions. [2021-05-02 16:14:03,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-02 16:14:03,470 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 6.304347826086956) internal successors, (145), 22 states have internal predecessors, (145), 22 states have call successors, (24), 22 states have call predecessors, (24), 20 states have return successors, (22), 20 states have call predecessors, (22), 21 states have call successors, (22) Word has length 194 [2021-05-02 16:14:03,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:14:03,471 INFO L225 Difference]: With dead ends: 205 [2021-05-02 16:14:03,471 INFO L226 Difference]: Without dead ends: 200 [2021-05-02 16:14:03,471 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 366.6ms TimeCoverageRelationStatistics Valid=651, Invalid=1071, Unknown=0, NotChecked=0, Total=1722 [2021-05-02 16:14:03,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-05-02 16:14:03,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2021-05-02 16:14:03,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 152 states have (on average 1.138157894736842) internal successors, (173), 152 states have internal predecessors, (173), 25 states have call successors, (25), 24 states have call predecessors, (25), 22 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-02 16:14:03,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 221 transitions. [2021-05-02 16:14:03,478 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 221 transitions. Word has length 194 [2021-05-02 16:14:03,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:14:03,478 INFO L480 AbstractCegarLoop]: Abstraction has 200 states and 221 transitions. [2021-05-02 16:14:03,478 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 6.304347826086956) internal successors, (145), 22 states have internal predecessors, (145), 22 states have call successors, (24), 22 states have call predecessors, (24), 20 states have return successors, (22), 20 states have call predecessors, (22), 21 states have call successors, (22) [2021-05-02 16:14:03,478 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 221 transitions. [2021-05-02 16:14:03,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2021-05-02 16:14:03,479 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:14:03,479 INFO L523 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 20, 20, 20, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:14:03,692 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:14:03,693 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:14:03,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:14:03,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1934081686, now seen corresponding path program 20 times [2021-05-02 16:14:03,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:14:03,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781474455] [2021-05-02 16:14:03,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:14:03,698 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:14:03,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [536769826] [2021-05-02 16:14:03,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:14:03,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 16:14:03,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-05-02 16:14:03,782 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 16:14:03,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 16:14:03,826 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 16:14:04,025 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-02 16:14:04,026 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-02 16:14:04,240 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-05-02 16:14:04,327 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 04:14:04 BoogieIcfgContainer [2021-05-02 16:14:04,328 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 16:14:04,328 INFO L168 Benchmark]: Toolchain (without parser) took 16290.83 ms. Allocated memory was 179.3 MB in the beginning and 312.5 MB in the end (delta: 133.2 MB). Free memory was 142.9 MB in the beginning and 280.2 MB in the end (delta: -137.3 MB). Peak memory consumption was 170.3 MB. Max. memory is 8.0 GB. [2021-05-02 16:14:04,328 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 179.3 MB. Free memory is still 159.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 16:14:04,328 INFO L168 Benchmark]: CACSL2BoogieTranslator took 174.15 ms. Allocated memory is still 179.3 MB. Free memory was 142.7 MB in the beginning and 161.3 MB in the end (delta: -18.7 MB). Peak memory consumption was 12.1 MB. Max. memory is 8.0 GB. [2021-05-02 16:14:04,328 INFO L168 Benchmark]: Boogie Preprocessor took 36.81 ms. Allocated memory is still 179.3 MB. Free memory was 161.3 MB in the beginning and 159.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 16:14:04,328 INFO L168 Benchmark]: RCFGBuilder took 292.56 ms. Allocated memory is still 179.3 MB. Free memory was 159.8 MB in the beginning and 144.6 MB in the end (delta: 15.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-02 16:14:04,328 INFO L168 Benchmark]: TraceAbstraction took 15781.90 ms. Allocated memory was 179.3 MB in the beginning and 312.5 MB in the end (delta: 133.2 MB). Free memory was 144.0 MB in the beginning and 280.2 MB in the end (delta: -136.2 MB). Peak memory consumption was 170.8 MB. Max. memory is 8.0 GB. [2021-05-02 16:14:04,329 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 179.3 MB. Free memory is still 159.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 174.15 ms. Allocated memory is still 179.3 MB. Free memory was 142.7 MB in the beginning and 161.3 MB in the end (delta: -18.7 MB). Peak memory consumption was 12.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 36.81 ms. Allocated memory is still 179.3 MB. Free memory was 161.3 MB in the beginning and 159.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 292.56 ms. Allocated memory is still 179.3 MB. Free memory was 159.8 MB in the beginning and 144.6 MB in the end (delta: 15.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 15781.90 ms. Allocated memory was 179.3 MB in the beginning and 312.5 MB in the end (delta: 133.2 MB). Free memory was 144.0 MB in the beginning and 280.2 MB in the end (delta: -136.2 MB). Peak memory consumption was 170.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 18]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L22] int counter = 0; VAL [\old(counter)=25, counter=0] [L24] int x1, x2; [L25] int y1, y2, y3; [L26] x1 = __VERIFIER_nondet_int() [L27] x2 = __VERIFIER_nondet_int() [L29] CALL assume_abort_if_not(x1 >= 0) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L13] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L29] RET assume_abort_if_not(x1 >= 0) VAL [\old(counter)=0, counter=0, x1=21, x2=1] [L30] CALL assume_abort_if_not(x2 != 0) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L13] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L30] RET assume_abort_if_not(x2 != 0) VAL [\old(counter)=0, counter=0, x1=21, x2=1] [L32] y1 = 0 [L33] y2 = 0 [L34] y3 = x1 VAL [\old(counter)=0, counter=0, x1=21, x2=1, y1=0, y2=0, y3=21] [L36] EXPR counter++ VAL [\old(counter)=0, counter=1, counter++=0, x1=21, x2=1, y1=0, y2=0, y3=21] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=1, x1=21, x2=1, y1=0, y2=0, y3=21] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=1, x1=21, x2=1, y1=0, y2=0, y3=21] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=1, x1=21, x2=1, y1=1, y2=0, y3=20] [L36] EXPR counter++ VAL [\old(counter)=0, counter=2, counter++=1, x1=21, x2=1, y1=1, y2=0, y3=20] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=2, x1=21, x2=1, y1=1, y2=0, y3=20] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=2, x1=21, x2=1, y1=1, y2=0, y3=20] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=2, x1=21, x2=1, y1=2, y2=0, y3=19] [L36] EXPR counter++ VAL [\old(counter)=0, counter=3, counter++=2, x1=21, x2=1, y1=2, y2=0, y3=19] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=3, x1=21, x2=1, y1=2, y2=0, y3=19] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=3, x1=21, x2=1, y1=2, y2=0, y3=19] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=3, x1=21, x2=1, y1=3, y2=0, y3=18] [L36] EXPR counter++ VAL [\old(counter)=0, counter=4, counter++=3, x1=21, x2=1, y1=3, y2=0, y3=18] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=4, x1=21, x2=1, y1=3, y2=0, y3=18] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=4, x1=21, x2=1, y1=3, y2=0, y3=18] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=4, x1=21, x2=1, y1=4, y2=0, y3=17] [L36] EXPR counter++ VAL [\old(counter)=0, counter=5, counter++=4, x1=21, x2=1, y1=4, y2=0, y3=17] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=5, x1=21, x2=1, y1=4, y2=0, y3=17] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=5, x1=21, x2=1, y1=4, y2=0, y3=17] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=5, x1=21, x2=1, y1=5, y2=0, y3=16] [L36] EXPR counter++ VAL [\old(counter)=0, counter=6, counter++=5, x1=21, x2=1, y1=5, y2=0, y3=16] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=6] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=6] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=6, x1=21, x2=1, y1=5, y2=0, y3=16] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=6, x1=21, x2=1, y1=5, y2=0, y3=16] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=6, x1=21, x2=1, y1=6, y2=0, y3=15] [L36] EXPR counter++ VAL [\old(counter)=0, counter=7, counter++=6, x1=21, x2=1, y1=6, y2=0, y3=15] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=7] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=7] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=7, x1=21, x2=1, y1=6, y2=0, y3=15] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=7, x1=21, x2=1, y1=6, y2=0, y3=15] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=7, x1=21, x2=1, y1=7, y2=0, y3=14] [L36] EXPR counter++ VAL [\old(counter)=0, counter=8, counter++=7, x1=21, x2=1, y1=7, y2=0, y3=14] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=8] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=8] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=8, x1=21, x2=1, y1=7, y2=0, y3=14] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=8, x1=21, x2=1, y1=7, y2=0, y3=14] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=8, x1=21, x2=1, y1=8, y2=0, y3=13] [L36] EXPR counter++ VAL [\old(counter)=0, counter=9, counter++=8, x1=21, x2=1, y1=8, y2=0, y3=13] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=9] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=9] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=9, x1=21, x2=1, y1=8, y2=0, y3=13] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=9, x1=21, x2=1, y1=8, y2=0, y3=13] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=9, x1=21, x2=1, y1=9, y2=0, y3=12] [L36] EXPR counter++ VAL [\old(counter)=0, counter=10, counter++=9, x1=21, x2=1, y1=9, y2=0, y3=12] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=10] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=10] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=10, x1=21, x2=1, y1=9, y2=0, y3=12] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=10, x1=21, x2=1, y1=9, y2=0, y3=12] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=10, x1=21, x2=1, y1=10, y2=0, y3=11] [L36] EXPR counter++ VAL [\old(counter)=0, counter=11, counter++=10, x1=21, x2=1, y1=10, y2=0, y3=11] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=11] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=11] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=11, x1=21, x2=1, y1=10, y2=0, y3=11] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=11, x1=21, x2=1, y1=10, y2=0, y3=11] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=11, x1=21, x2=1, y1=11, y2=0, y3=10] [L36] EXPR counter++ VAL [\old(counter)=0, counter=12, counter++=11, x1=21, x2=1, y1=11, y2=0, y3=10] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=12] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=12] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=12, x1=21, x2=1, y1=11, y2=0, y3=10] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=12, x1=21, x2=1, y1=11, y2=0, y3=10] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=12, x1=21, x2=1, y1=12, y2=0, y3=9] [L36] EXPR counter++ VAL [\old(counter)=0, counter=13, counter++=12, x1=21, x2=1, y1=12, y2=0, y3=9] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=13] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=13] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=13, x1=21, x2=1, y1=12, y2=0, y3=9] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=13, x1=21, x2=1, y1=12, y2=0, y3=9] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=13, x1=21, x2=1, y1=13, y2=0, y3=8] [L36] EXPR counter++ VAL [\old(counter)=0, counter=14, counter++=13, x1=21, x2=1, y1=13, y2=0, y3=8] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=14] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=14] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=14, x1=21, x2=1, y1=13, y2=0, y3=8] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=14, x1=21, x2=1, y1=13, y2=0, y3=8] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=14, x1=21, x2=1, y1=14, y2=0, y3=7] [L36] EXPR counter++ VAL [\old(counter)=0, counter=15, counter++=14, x1=21, x2=1, y1=14, y2=0, y3=7] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=15] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=15] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=15, x1=21, x2=1, y1=14, y2=0, y3=7] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=15, x1=21, x2=1, y1=14, y2=0, y3=7] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=15, x1=21, x2=1, y1=15, y2=0, y3=6] [L36] EXPR counter++ VAL [\old(counter)=0, counter=16, counter++=15, x1=21, x2=1, y1=15, y2=0, y3=6] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=16] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=16] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=16, x1=21, x2=1, y1=15, y2=0, y3=6] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=16, x1=21, x2=1, y1=15, y2=0, y3=6] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=16, x1=21, x2=1, y1=16, y2=0, y3=5] [L36] EXPR counter++ VAL [\old(counter)=0, counter=17, counter++=16, x1=21, x2=1, y1=16, y2=0, y3=5] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=17] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=17] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=17, x1=21, x2=1, y1=16, y2=0, y3=5] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=17, x1=21, x2=1, y1=16, y2=0, y3=5] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=17, x1=21, x2=1, y1=17, y2=0, y3=4] [L36] EXPR counter++ VAL [\old(counter)=0, counter=18, counter++=17, x1=21, x2=1, y1=17, y2=0, y3=4] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=18] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=18] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=18, x1=21, x2=1, y1=17, y2=0, y3=4] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=18, x1=21, x2=1, y1=17, y2=0, y3=4] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=18, x1=21, x2=1, y1=18, y2=0, y3=3] [L36] EXPR counter++ VAL [\old(counter)=0, counter=19, counter++=18, x1=21, x2=1, y1=18, y2=0, y3=3] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=19] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=19] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=19, x1=21, x2=1, y1=18, y2=0, y3=3] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=19, x1=21, x2=1, y1=18, y2=0, y3=3] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=19, x1=21, x2=1, y1=19, y2=0, y3=2] [L36] EXPR counter++ VAL [\old(counter)=0, counter=20, counter++=19, x1=21, x2=1, y1=19, y2=0, y3=2] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=20] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=20] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=20, x1=21, x2=1, y1=19, y2=0, y3=2] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=20, x1=21, x2=1, y1=19, y2=0, y3=2] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=20, x1=21, x2=1, y1=20, y2=0, y3=1] [L36] EXPR counter++ VAL [\old(counter)=0, counter=21, counter++=20, x1=21, x2=1, y1=20, y2=0, y3=1] [L36] COND FALSE !(counter++<20) [L50] CALL __VERIFIER_assert(y1*x2 + y2 == x1) VAL [\old(cond)=0, \old(counter)=0, counter=21] [L16] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=21] [L18] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=21] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 15663.3ms, OverallIterations: 24, TraceHistogramMax: 21, EmptinessCheckTime: 27.2ms, AutomataDifference: 3437.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 777 SDtfs, 992 SDslu, 2512 SDs, 0 SdLazy, 1274 SolverSat, 393 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1076.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2406 GetRequests, 1963 SyntacticMatches, 0 SemanticMatches, 443 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1362 ImplicationChecksByTransitivity, 3095.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=200occurred in iteration=23, InterpolantAutomatonStates: 482, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 182.3ms AutomataMinimizationTime, 23 MinimizatonAttempts, 9 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 253.3ms SsaConstructionTime, 927.3ms SatisfiabilityAnalysisTime, 4874.0ms InterpolantComputationTime, 2447 NumberOfCodeBlocks, 2447 NumberOfCodeBlocksAsserted, 127 NumberOfCheckSat, 2221 ConstructedInterpolants, 0 QuantifiedInterpolants, 6472 SizeOfPredicates, 216 NumberOfNonLiveVariables, 7175 ConjunctsInSsa, 516 ConjunctsInUnsatCore, 23 InterpolantComputations, 2 PerfectInterpolantSequences, 467/11114 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...