/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/hard2_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 03:39:23,187 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 03:39:23,188 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 03:39:23,208 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 03:39:23,214 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 03:39:23,214 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 03:39:23,215 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 03:39:23,216 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 03:39:23,216 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 03:39:23,217 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 03:39:23,218 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 03:39:23,219 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 03:39:23,219 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 03:39:23,220 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 03:39:23,221 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 03:39:23,222 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 03:39:23,223 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 03:39:23,228 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 03:39:23,229 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 03:39:23,229 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 03:39:23,234 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-06 03:39:23,253 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 03:39:23,253 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 03:39:23,255 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 03:39:23,256 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 03:39:23,256 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 03:39:23,256 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 03:39:23,256 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 03:39:23,256 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 03:39:23,257 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 03:39:23,258 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 03:39:23,258 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 03:39:23,258 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 03:39:23,258 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 03:39:23,259 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 03:39:23,259 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 03:39:23,259 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 03:39:23,259 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 03:39:23,259 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 03:39:23,259 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 03:39:23,259 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 03:39:23,259 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 03:39:23,259 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 03:39:23,260 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 03:39:23,260 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 03:39:23,260 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 03:39:23,260 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 03:39:23,260 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 03:39:23,260 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 03:39:23,260 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 03:39:23,484 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 03:39:23,507 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 03:39:23,509 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 03:39:23,510 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 03:39:23,511 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 03:39:23,512 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard2_valuebound50.c [2021-05-06 03:39:23,573 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f0219605d/5aef982180fd4bd0a7c5a88d8e81b18a/FLAG1013df305 [2021-05-06 03:39:23,931 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 03:39:23,932 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard2_valuebound50.c [2021-05-06 03:39:23,937 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f0219605d/5aef982180fd4bd0a7c5a88d8e81b18a/FLAG1013df305 [2021-05-06 03:39:23,954 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f0219605d/5aef982180fd4bd0a7c5a88d8e81b18a [2021-05-06 03:39:23,959 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 03:39:23,962 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 03:39:23,964 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 03:39:23,964 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 03:39:23,967 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 03:39:23,968 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 03:39:23" (1/1) ... [2021-05-06 03:39:23,969 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79a38d2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:39:23, skipping insertion in model container [2021-05-06 03:39:23,969 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 03:39:23" (1/1) ... [2021-05-06 03:39:23,975 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 03:39:23,992 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 03:39:24,114 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/hard2_valuebound50.c[526,539] [2021-05-06 03:39:24,128 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 03:39:24,135 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 03:39:24,183 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/hard2_valuebound50.c[526,539] [2021-05-06 03:39:24,187 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 03:39:24,203 INFO L208 MainTranslator]: Completed translation [2021-05-06 03:39:24,203 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:39:24 WrapperNode [2021-05-06 03:39:24,204 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 03:39:24,205 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 03:39:24,205 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 03:39:24,206 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 03:39:24,214 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:39:24" (1/1) ... [2021-05-06 03:39:24,214 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:39:24" (1/1) ... [2021-05-06 03:39:24,220 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:39:24" (1/1) ... [2021-05-06 03:39:24,221 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:39:24" (1/1) ... [2021-05-06 03:39:24,235 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:39:24" (1/1) ... [2021-05-06 03:39:24,239 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:39:24" (1/1) ... [2021-05-06 03:39:24,243 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:39:24" (1/1) ... [2021-05-06 03:39:24,246 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 03:39:24,247 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 03:39:24,247 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 03:39:24,247 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 03:39:24,248 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:39:24" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 03:39:24,303 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 03:39:24,303 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 03:39:24,303 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 03:39:24,303 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 03:39:24,304 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 03:39:24,304 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 03:39:24,304 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 03:39:24,304 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 03:39:24,305 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 03:39:24,305 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 03:39:24,305 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 03:39:24,305 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 03:39:24,305 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 03:39:24,306 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 03:39:24,306 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 03:39:24,306 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 03:39:24,306 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 03:39:24,306 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 03:39:24,306 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 03:39:24,306 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 03:39:24,541 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 03:39:24,541 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 03:39:24,542 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 03:39:24 BoogieIcfgContainer [2021-05-06 03:39:24,542 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 03:39:24,543 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 03:39:24,543 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 03:39:24,545 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 03:39:24,545 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 03:39:23" (1/3) ... [2021-05-06 03:39:24,546 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a2caae9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 03:39:24, skipping insertion in model container [2021-05-06 03:39:24,546 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:39:24" (2/3) ... [2021-05-06 03:39:24,546 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a2caae9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 03:39:24, skipping insertion in model container [2021-05-06 03:39:24,546 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 03:39:24" (3/3) ... [2021-05-06 03:39:24,547 INFO L111 eAbstractionObserver]: Analyzing ICFG hard2_valuebound50.c [2021-05-06 03:39:24,551 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 03:39:24,553 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 03:39:24,564 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 03:39:24,597 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 03:39:24,598 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 03:39:24,598 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 03:39:24,598 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 03:39:24,598 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 03:39:24,598 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 03:39:24,598 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 03:39:24,598 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 03:39:24,621 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 03:39:24,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 03:39:24,625 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:39:24,626 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:39:24,626 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:39:24,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:39:24,630 INFO L82 PathProgramCache]: Analyzing trace with hash -977830905, now seen corresponding path program 1 times [2021-05-06 03:39:24,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:39:24,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767742622] [2021-05-06 03:39:24,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:39:24,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:39:24,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 03:39:24,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:39:24,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 03:39:24,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:39:24,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 03:39:24,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:39:24,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767742622] [2021-05-06 03:39:24,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767742622] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:39:24,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:39:24,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 03:39:24,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781773899] [2021-05-06 03:39:24,874 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 03:39:24,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:39:24,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 03:39:24,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 03:39:24,884 INFO L87 Difference]: Start difference. First operand has 35 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 03:39:24,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:39:24,963 INFO L93 Difference]: Finished difference Result 61 states and 95 transitions. [2021-05-06 03:39:24,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 03:39:24,965 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-06 03:39:24,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:39:24,970 INFO L225 Difference]: With dead ends: 61 [2021-05-06 03:39:24,970 INFO L226 Difference]: Without dead ends: 30 [2021-05-06 03:39:24,972 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 03:39:24,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-05-06 03:39:24,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-05-06 03:39:24,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 03:39:24,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2021-05-06 03:39:25,000 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 17 [2021-05-06 03:39:25,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:39:25,001 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2021-05-06 03:39:25,001 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 03:39:25,001 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2021-05-06 03:39:25,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 03:39:25,001 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:39:25,001 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:39:25,002 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 03:39:25,002 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:39:25,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:39:25,003 INFO L82 PathProgramCache]: Analyzing trace with hash -297772535, now seen corresponding path program 1 times [2021-05-06 03:39:25,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:39:25,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889240629] [2021-05-06 03:39:25,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:39:25,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:39:25,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 03:39:25,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:39:25,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 03:39:25,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:39:25,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 03:39:25,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:39:25,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889240629] [2021-05-06 03:39:25,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889240629] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:39:25,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:39:25,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 03:39:25,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575259592] [2021-05-06 03:39:25,093 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 03:39:25,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:39:25,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 03:39:25,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:39:25,094 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 03:39:25,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:39:25,357 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2021-05-06 03:39:25,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 03:39:25,358 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-06 03:39:25,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:39:25,359 INFO L225 Difference]: With dead ends: 43 [2021-05-06 03:39:25,360 INFO L226 Difference]: Without dead ends: 41 [2021-05-06 03:39:25,361 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 108.8ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 03:39:25,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-06 03:39:25,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 34. [2021-05-06 03:39:25,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 03:39:25,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2021-05-06 03:39:25,385 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 17 [2021-05-06 03:39:25,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:39:25,385 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2021-05-06 03:39:25,385 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 03:39:25,386 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2021-05-06 03:39:25,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 03:39:25,386 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:39:25,386 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:39:25,386 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 03:39:25,386 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:39:25,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:39:25,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1294462534, now seen corresponding path program 1 times [2021-05-06 03:39:25,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:39:25,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723528771] [2021-05-06 03:39:25,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:39:25,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:39:25,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 03:39:25,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:39:25,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 03:39:25,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:39:25,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-05-06 03:39:25,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:39:25,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 03:39:25,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:39:25,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723528771] [2021-05-06 03:39:25,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723528771] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:39:25,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:39:25,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 03:39:25,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655073001] [2021-05-06 03:39:25,478 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 03:39:25,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:39:25,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 03:39:25,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:39:25,479 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 03:39:25,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:39:25,734 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2021-05-06 03:39:25,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 03:39:25,734 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-06 03:39:25,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:39:25,736 INFO L225 Difference]: With dead ends: 47 [2021-05-06 03:39:25,736 INFO L226 Difference]: Without dead ends: 45 [2021-05-06 03:39:25,737 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 131.0ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 03:39:25,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-06 03:39:25,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 38. [2021-05-06 03:39:25,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 03:39:25,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2021-05-06 03:39:25,751 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 22 [2021-05-06 03:39:25,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:39:25,751 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2021-05-06 03:39:25,752 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 03:39:25,752 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2021-05-06 03:39:25,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-06 03:39:25,753 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:39:25,753 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:39:25,753 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-06 03:39:25,753 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:39:25,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:39:25,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1449027479, now seen corresponding path program 1 times [2021-05-06 03:39:25,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:39:25,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91703528] [2021-05-06 03:39:25,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:39:25,780 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:39:25,780 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1668005921] [2021-05-06 03:39:25,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:39:25,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:39:25,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 03:39:25,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:39:25,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:25,969 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 03:39:25,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:39:25,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91703528] [2021-05-06 03:39:25,969 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:39:25,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668005921] [2021-05-06 03:39:25,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668005921] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:39:25,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:39:25,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 03:39:25,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554629187] [2021-05-06 03:39:25,970 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 03:39:25,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:39:25,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 03:39:25,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 03:39:25,971 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 03:39:26,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:39:26,016 INFO L93 Difference]: Finished difference Result 66 states and 84 transitions. [2021-05-06 03:39:26,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 03:39:26,017 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2021-05-06 03:39:26,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:39:26,019 INFO L225 Difference]: With dead ends: 66 [2021-05-06 03:39:26,019 INFO L226 Difference]: Without dead ends: 52 [2021-05-06 03:39:26,019 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.3ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:39:26,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-06 03:39:26,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-05-06 03:39:26,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 31 states have internal predecessors, (34), 16 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 03:39:26,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 63 transitions. [2021-05-06 03:39:26,027 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 63 transitions. Word has length 27 [2021-05-06 03:39:26,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:39:26,028 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 63 transitions. [2021-05-06 03:39:26,028 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 03:39:26,028 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 63 transitions. [2021-05-06 03:39:26,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-06 03:39:26,028 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:39:26,028 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:39:26,248 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:39:26,249 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:39:26,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:39:26,249 INFO L82 PathProgramCache]: Analyzing trace with hash 905213191, now seen corresponding path program 1 times [2021-05-06 03:39:26,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:39:26,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154906719] [2021-05-06 03:39:26,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:39:26,262 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:39:26,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [297154964] [2021-05-06 03:39:26,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:39:26,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:39:26,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 03:39:26,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:39:26,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:26,431 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 03:39:26,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:39:26,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154906719] [2021-05-06 03:39:26,431 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:39:26,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297154964] [2021-05-06 03:39:26,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297154964] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:39:26,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:39:26,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 03:39:26,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405571738] [2021-05-06 03:39:26,432 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 03:39:26,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:39:26,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 03:39:26,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 03:39:26,433 INFO L87 Difference]: Start difference. First operand 52 states and 63 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 03:39:26,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:39:26,490 INFO L93 Difference]: Finished difference Result 65 states and 80 transitions. [2021-05-06 03:39:26,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 03:39:26,493 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2021-05-06 03:39:26,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:39:26,496 INFO L225 Difference]: With dead ends: 65 [2021-05-06 03:39:26,496 INFO L226 Difference]: Without dead ends: 58 [2021-05-06 03:39:26,497 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.9ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:39:26,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-06 03:39:26,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2021-05-06 03:39:26,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 35 states have internal predecessors, (39), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-06 03:39:26,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 69 transitions. [2021-05-06 03:39:26,518 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 69 transitions. Word has length 34 [2021-05-06 03:39:26,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:39:26,520 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 69 transitions. [2021-05-06 03:39:26,521 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 03:39:26,521 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 69 transitions. [2021-05-06 03:39:26,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-06 03:39:26,521 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:39:26,522 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:39:26,736 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:39:26,737 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:39:26,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:39:26,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1576096488, now seen corresponding path program 1 times [2021-05-06 03:39:26,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:39:26,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597831909] [2021-05-06 03:39:26,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:39:26,746 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:39:26,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [380672485] [2021-05-06 03:39:26,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:39:26,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:39:26,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 03:39:26,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:39:26,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:26,949 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-06 03:39:26,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:39:26,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597831909] [2021-05-06 03:39:26,951 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:39:26,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380672485] [2021-05-06 03:39:26,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380672485] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:39:26,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:39:26,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 03:39:26,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998713647] [2021-05-06 03:39:26,951 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 03:39:26,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:39:26,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 03:39:26,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:39:26,952 INFO L87 Difference]: Start difference. First operand 57 states and 69 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 03:39:27,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:39:27,066 INFO L93 Difference]: Finished difference Result 105 states and 141 transitions. [2021-05-06 03:39:27,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 03:39:27,067 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 44 [2021-05-06 03:39:27,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:39:27,069 INFO L225 Difference]: With dead ends: 105 [2021-05-06 03:39:27,069 INFO L226 Difference]: Without dead ends: 76 [2021-05-06 03:39:27,070 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.4ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 03:39:27,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-05-06 03:39:27,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2021-05-06 03:39:27,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 46 states have internal predecessors, (50), 24 states have call successors, (24), 9 states have call predecessors, (24), 8 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 03:39:27,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 95 transitions. [2021-05-06 03:39:27,078 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 95 transitions. Word has length 44 [2021-05-06 03:39:27,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:39:27,079 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 95 transitions. [2021-05-06 03:39:27,079 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 03:39:27,079 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 95 transitions. [2021-05-06 03:39:27,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-06 03:39:27,080 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:39:27,080 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:39:27,301 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:39:27,301 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:39:27,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:39:27,302 INFO L82 PathProgramCache]: Analyzing trace with hash -1230656439, now seen corresponding path program 2 times [2021-05-06 03:39:27,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:39:27,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825464801] [2021-05-06 03:39:27,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:39:27,320 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:39:27,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [606336406] [2021-05-06 03:39:27,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:39:27,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 03:39:27,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:39:27,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 03:39:27,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:39:27,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:27,526 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 16 proven. 13 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-05-06 03:39:27,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:39:27,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825464801] [2021-05-06 03:39:27,527 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:39:27,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606336406] [2021-05-06 03:39:27,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606336406] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:39:27,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:39:27,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 03:39:27,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611534370] [2021-05-06 03:39:27,527 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 03:39:27,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:39:27,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 03:39:27,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 03:39:27,528 INFO L87 Difference]: Start difference. First operand 76 states and 95 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 03:39:27,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:39:27,663 INFO L93 Difference]: Finished difference Result 134 states and 185 transitions. [2021-05-06 03:39:27,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 03:39:27,665 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 61 [2021-05-06 03:39:27,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:39:27,667 INFO L225 Difference]: With dead ends: 134 [2021-05-06 03:39:27,667 INFO L226 Difference]: Without dead ends: 105 [2021-05-06 03:39:27,669 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.5ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 03:39:27,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-05-06 03:39:27,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 103. [2021-05-06 03:39:27,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 58 states have (on average 1.1724137931034482) internal successors, (68), 62 states have internal predecessors, (68), 35 states have call successors, (35), 10 states have call predecessors, (35), 9 states have return successors, (32), 30 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-06 03:39:27,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 135 transitions. [2021-05-06 03:39:27,699 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 135 transitions. Word has length 61 [2021-05-06 03:39:27,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:39:27,700 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 135 transitions. [2021-05-06 03:39:27,700 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 03:39:27,700 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 135 transitions. [2021-05-06 03:39:27,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-06 03:39:27,702 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:39:27,703 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:39:27,916 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:39:27,917 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:39:27,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:39:27,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1615471943, now seen corresponding path program 1 times [2021-05-06 03:39:27,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:39:27,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470905814] [2021-05-06 03:39:27,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:39:27,924 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:39:27,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1902018624] [2021-05-06 03:39:27,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:39:27,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:39:27,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-06 03:39:27,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:39:28,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:28,159 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-05-06 03:39:28,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:39:28,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470905814] [2021-05-06 03:39:28,159 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:39:28,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902018624] [2021-05-06 03:39:28,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902018624] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:39:28,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:39:28,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 03:39:28,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853072392] [2021-05-06 03:39:28,161 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 03:39:28,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:39:28,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 03:39:28,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 03:39:28,163 INFO L87 Difference]: Start difference. First operand 103 states and 135 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-06 03:39:28,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:39:28,277 INFO L93 Difference]: Finished difference Result 127 states and 154 transitions. [2021-05-06 03:39:28,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 03:39:28,278 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 64 [2021-05-06 03:39:28,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:39:28,279 INFO L225 Difference]: With dead ends: 127 [2021-05-06 03:39:28,279 INFO L226 Difference]: Without dead ends: 125 [2021-05-06 03:39:28,279 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.2ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 03:39:28,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-05-06 03:39:28,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 123. [2021-05-06 03:39:28,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 73 states have (on average 1.1369863013698631) internal successors, (83), 77 states have internal predecessors, (83), 35 states have call successors, (35), 15 states have call predecessors, (35), 14 states have return successors, (32), 30 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-06 03:39:28,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 150 transitions. [2021-05-06 03:39:28,289 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 150 transitions. Word has length 64 [2021-05-06 03:39:28,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:39:28,289 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 150 transitions. [2021-05-06 03:39:28,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-06 03:39:28,290 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 150 transitions. [2021-05-06 03:39:28,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-06 03:39:28,290 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:39:28,291 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 2, 2, 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, 1, 1, 1, 1, 1] [2021-05-06 03:39:28,496 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:39:28,497 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:39:28,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:39:28,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1554666020, now seen corresponding path program 1 times [2021-05-06 03:39:28,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:39:28,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350840679] [2021-05-06 03:39:28,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:39:28,504 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:39:28,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2051298514] [2021-05-06 03:39:28,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:39:28,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:39:28,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-06 03:39:28,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:39:28,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:28,801 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 20 proven. 9 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-05-06 03:39:28,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:39:28,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350840679] [2021-05-06 03:39:28,802 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:39:28,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051298514] [2021-05-06 03:39:28,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051298514] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:39:28,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:39:28,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 03:39:28,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591243234] [2021-05-06 03:39:28,803 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 03:39:28,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:39:28,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 03:39:28,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 03:39:28,803 INFO L87 Difference]: Start difference. First operand 123 states and 150 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 03:39:28,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:39:28,898 INFO L93 Difference]: Finished difference Result 131 states and 157 transitions. [2021-05-06 03:39:28,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 03:39:28,898 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 75 [2021-05-06 03:39:28,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:39:28,900 INFO L225 Difference]: With dead ends: 131 [2021-05-06 03:39:28,900 INFO L226 Difference]: Without dead ends: 103 [2021-05-06 03:39:28,902 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 42.0ms TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-06 03:39:28,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-05-06 03:39:28,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2021-05-06 03:39:28,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 60 states have (on average 1.15) internal successors, (69), 63 states have internal predecessors, (69), 31 states have call successors, (31), 12 states have call predecessors, (31), 11 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2021-05-06 03:39:28,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 128 transitions. [2021-05-06 03:39:28,915 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 128 transitions. Word has length 75 [2021-05-06 03:39:28,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:39:28,917 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 128 transitions. [2021-05-06 03:39:28,917 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 03:39:28,917 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 128 transitions. [2021-05-06 03:39:28,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-05-06 03:39:28,919 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:39:28,919 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:39:29,124 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:39:29,125 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:39:29,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:39:29,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1862740680, now seen corresponding path program 3 times [2021-05-06 03:39:29,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:39:29,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258232500] [2021-05-06 03:39:29,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:39:29,132 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:39:29,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [176281222] [2021-05-06 03:39:29,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:39:29,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 03:39:29,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:39:29,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 03:39:29,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:39:29,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:29,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:29,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:29,368 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 59 proven. 7 refuted. 0 times theorem prover too weak. 203 trivial. 0 not checked. [2021-05-06 03:39:29,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:39:29,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258232500] [2021-05-06 03:39:29,369 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:39:29,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176281222] [2021-05-06 03:39:29,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176281222] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:39:29,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:39:29,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 03:39:29,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562834255] [2021-05-06 03:39:29,369 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 03:39:29,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:39:29,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 03:39:29,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-06 03:39:29,370 INFO L87 Difference]: Start difference. First operand 103 states and 128 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 03:39:29,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:39:29,482 INFO L93 Difference]: Finished difference Result 123 states and 150 transitions. [2021-05-06 03:39:29,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 03:39:29,482 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 78 [2021-05-06 03:39:29,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:39:29,486 INFO L225 Difference]: With dead ends: 123 [2021-05-06 03:39:29,486 INFO L226 Difference]: Without dead ends: 111 [2021-05-06 03:39:29,487 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 44.1ms TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-05-06 03:39:29,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-05-06 03:39:29,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2021-05-06 03:39:29,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 65 states have (on average 1.1384615384615384) internal successors, (74), 68 states have internal predecessors, (74), 33 states have call successors, (33), 13 states have call predecessors, (33), 12 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2021-05-06 03:39:29,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 137 transitions. [2021-05-06 03:39:29,500 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 137 transitions. Word has length 78 [2021-05-06 03:39:29,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:39:29,500 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 137 transitions. [2021-05-06 03:39:29,500 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 03:39:29,500 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 137 transitions. [2021-05-06 03:39:29,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-05-06 03:39:29,502 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:39:29,502 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 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, 1, 1, 1, 1, 1] [2021-05-06 03:39:29,717 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-06 03:39:29,719 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:39:29,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:39:29,719 INFO L82 PathProgramCache]: Analyzing trace with hash 330473976, now seen corresponding path program 2 times [2021-05-06 03:39:29,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:39:29,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397554581] [2021-05-06 03:39:29,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:39:29,726 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:39:29,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [727831046] [2021-05-06 03:39:29,726 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:39:29,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 03:39:29,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:39:29,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-06 03:39:29,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:39:29,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:29,960 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 22 proven. 17 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2021-05-06 03:39:29,961 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:39:29,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397554581] [2021-05-06 03:39:29,961 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:39:29,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727831046] [2021-05-06 03:39:29,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727831046] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:39:29,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:39:29,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 03:39:29,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079636624] [2021-05-06 03:39:29,961 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 03:39:29,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:39:29,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 03:39:29,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 03:39:29,962 INFO L87 Difference]: Start difference. First operand 111 states and 137 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 03:39:30,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:39:30,105 INFO L93 Difference]: Finished difference Result 138 states and 161 transitions. [2021-05-06 03:39:30,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 03:39:30,106 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 81 [2021-05-06 03:39:30,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:39:30,107 INFO L225 Difference]: With dead ends: 138 [2021-05-06 03:39:30,107 INFO L226 Difference]: Without dead ends: 136 [2021-05-06 03:39:30,108 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 50.2ms TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 03:39:30,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-05-06 03:39:30,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 133. [2021-05-06 03:39:30,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 81 states have (on average 1.1111111111111112) internal successors, (90), 85 states have internal predecessors, (90), 34 states have call successors, (34), 18 states have call predecessors, (34), 17 states have return successors, (31), 29 states have call predecessors, (31), 31 states have call successors, (31) [2021-05-06 03:39:30,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 155 transitions. [2021-05-06 03:39:30,123 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 155 transitions. Word has length 81 [2021-05-06 03:39:30,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:39:30,124 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 155 transitions. [2021-05-06 03:39:30,124 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 03:39:30,124 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 155 transitions. [2021-05-06 03:39:30,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-05-06 03:39:30,128 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:39:30,128 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:39:30,340 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-06 03:39:30,341 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:39:30,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:39:30,341 INFO L82 PathProgramCache]: Analyzing trace with hash -132947769, now seen corresponding path program 3 times [2021-05-06 03:39:30,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:39:30,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635892514] [2021-05-06 03:39:30,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:39:30,347 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:39:30,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [722464563] [2021-05-06 03:39:30,348 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:39:30,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 03:39:30,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:39:30,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-06 03:39:30,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:39:30,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:30,687 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 26 proven. 24 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2021-05-06 03:39:30,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:39:30,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635892514] [2021-05-06 03:39:30,688 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:39:30,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722464563] [2021-05-06 03:39:30,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722464563] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:39:30,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:39:30,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 03:39:30,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506543390] [2021-05-06 03:39:30,689 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 03:39:30,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:39:30,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 03:39:30,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-05-06 03:39:30,690 INFO L87 Difference]: Start difference. First operand 133 states and 155 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 6 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 03:39:30,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:39:30,892 INFO L93 Difference]: Finished difference Result 151 states and 174 transitions. [2021-05-06 03:39:30,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 03:39:30,892 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 6 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 94 [2021-05-06 03:39:30,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:39:30,893 INFO L225 Difference]: With dead ends: 151 [2021-05-06 03:39:30,893 INFO L226 Difference]: Without dead ends: 144 [2021-05-06 03:39:30,893 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 75.3ms TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-05-06 03:39:30,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-05-06 03:39:30,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 141. [2021-05-06 03:39:30,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 87 states have (on average 1.0919540229885059) internal successors, (95), 91 states have internal predecessors, (95), 34 states have call successors, (34), 20 states have call predecessors, (34), 19 states have return successors, (31), 29 states have call predecessors, (31), 31 states have call successors, (31) [2021-05-06 03:39:30,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 160 transitions. [2021-05-06 03:39:30,903 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 160 transitions. Word has length 94 [2021-05-06 03:39:30,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:39:30,903 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 160 transitions. [2021-05-06 03:39:30,904 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 6 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 03:39:30,904 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 160 transitions. [2021-05-06 03:39:30,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-05-06 03:39:30,904 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:39:30,904 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:39:31,122 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:39:31,123 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:39:31,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:39:31,123 INFO L82 PathProgramCache]: Analyzing trace with hash -1821891511, now seen corresponding path program 1 times [2021-05-06 03:39:31,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:39:31,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166138055] [2021-05-06 03:39:31,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:39:31,129 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:39:31,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [518364219] [2021-05-06 03:39:31,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:39:31,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:39:31,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-06 03:39:31,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:39:31,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:31,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:31,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:31,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:31,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:31,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:31,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:31,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:31,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:31,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:31,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:31,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:31,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:31,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:31,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:31,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:31,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:31,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:31,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:31,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:31,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:31,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:31,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:31,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:31,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:31,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:31,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:31,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:31,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:31,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:31,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:31,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:31,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:31,449 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2021-05-06 03:39:31,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:39:31,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166138055] [2021-05-06 03:39:31,450 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:39:31,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518364219] [2021-05-06 03:39:31,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518364219] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:39:31,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:39:31,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 03:39:31,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373722441] [2021-05-06 03:39:31,450 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 03:39:31,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:39:31,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 03:39:31,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:39:31,451 INFO L87 Difference]: Start difference. First operand 141 states and 160 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 03:39:31,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:39:31,529 INFO L93 Difference]: Finished difference Result 191 states and 220 transitions. [2021-05-06 03:39:31,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 03:39:31,530 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 94 [2021-05-06 03:39:31,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:39:31,530 INFO L225 Difference]: With dead ends: 191 [2021-05-06 03:39:31,531 INFO L226 Difference]: Without dead ends: 142 [2021-05-06 03:39:31,531 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 32.4ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 03:39:31,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-05-06 03:39:31,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 129. [2021-05-06 03:39:31,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 81 states have (on average 1.0617283950617284) internal successors, (86), 83 states have internal predecessors, (86), 28 states have call successors, (28), 20 states have call predecessors, (28), 19 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-06 03:39:31,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 139 transitions. [2021-05-06 03:39:31,541 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 139 transitions. Word has length 94 [2021-05-06 03:39:31,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:39:31,541 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 139 transitions. [2021-05-06 03:39:31,541 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 03:39:31,541 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 139 transitions. [2021-05-06 03:39:31,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-05-06 03:39:31,543 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:39:31,543 INFO L523 BasicCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:39:31,760 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:39:31,761 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:39:31,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:39:31,761 INFO L82 PathProgramCache]: Analyzing trace with hash 799997287, now seen corresponding path program 4 times [2021-05-06 03:39:31,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:39:31,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438248591] [2021-05-06 03:39:31,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:39:31,767 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:39:31,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [143357656] [2021-05-06 03:39:31,767 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:39:31,817 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 03:39:31,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:39:31,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-06 03:39:31,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:39:31,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:32,000 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 28 proven. 32 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-05-06 03:39:32,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:39:32,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438248591] [2021-05-06 03:39:32,000 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:39:32,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143357656] [2021-05-06 03:39:32,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143357656] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:39:32,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:39:32,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 03:39:32,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616260231] [2021-05-06 03:39:32,001 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 03:39:32,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:39:32,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 03:39:32,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-05-06 03:39:32,001 INFO L87 Difference]: Start difference. First operand 129 states and 139 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2021-05-06 03:39:32,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:39:32,183 INFO L93 Difference]: Finished difference Result 168 states and 184 transitions. [2021-05-06 03:39:32,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 03:39:32,184 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 98 [2021-05-06 03:39:32,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:39:32,185 INFO L225 Difference]: With dead ends: 168 [2021-05-06 03:39:32,185 INFO L226 Difference]: Without dead ends: 166 [2021-05-06 03:39:32,185 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 57.0ms TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 03:39:32,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-05-06 03:39:32,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 164. [2021-05-06 03:39:32,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 104 states have (on average 1.0769230769230769) internal successors, (112), 106 states have internal predecessors, (112), 35 states have call successors, (35), 25 states have call predecessors, (35), 24 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-06 03:39:32,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 179 transitions. [2021-05-06 03:39:32,196 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 179 transitions. Word has length 98 [2021-05-06 03:39:32,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:39:32,196 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 179 transitions. [2021-05-06 03:39:32,196 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2021-05-06 03:39:32,196 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 179 transitions. [2021-05-06 03:39:32,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-06 03:39:32,197 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:39:32,197 INFO L523 BasicCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 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, 1, 1] [2021-05-06 03:39:32,415 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-06 03:39:32,415 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:39:32,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:39:32,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1306280540, now seen corresponding path program 2 times [2021-05-06 03:39:32,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:39:32,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710676895] [2021-05-06 03:39:32,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:39:32,421 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:39:32,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2085260352] [2021-05-06 03:39:32,421 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:39:32,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 03:39:32,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:39:32,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-06 03:39:32,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:39:32,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:32,703 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 30 proven. 28 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2021-05-06 03:39:32,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:39:32,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710676895] [2021-05-06 03:39:32,703 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:39:32,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085260352] [2021-05-06 03:39:32,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085260352] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:39:32,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:39:32,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 03:39:32,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21147027] [2021-05-06 03:39:32,704 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 03:39:32,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:39:32,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 03:39:32,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-05-06 03:39:32,705 INFO L87 Difference]: Start difference. First operand 164 states and 179 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 7 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2021-05-06 03:39:32,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:39:32,853 INFO L93 Difference]: Finished difference Result 170 states and 184 transitions. [2021-05-06 03:39:32,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 03:39:32,853 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 7 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 105 [2021-05-06 03:39:32,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:39:32,854 INFO L225 Difference]: With dead ends: 170 [2021-05-06 03:39:32,854 INFO L226 Difference]: Without dead ends: 129 [2021-05-06 03:39:32,854 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 76.9ms TimeCoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-05-06 03:39:32,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-05-06 03:39:32,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2021-05-06 03:39:32,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 81 states have (on average 1.0864197530864197) internal successors, (88), 82 states have internal predecessors, (88), 28 states have call successors, (28), 20 states have call predecessors, (28), 19 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-05-06 03:39:32,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 142 transitions. [2021-05-06 03:39:32,862 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 142 transitions. Word has length 105 [2021-05-06 03:39:32,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:39:32,862 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 142 transitions. [2021-05-06 03:39:32,862 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 7 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2021-05-06 03:39:32,862 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 142 transitions. [2021-05-06 03:39:32,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-05-06 03:39:32,863 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:39:32,863 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:39:33,085 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-06 03:39:33,085 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:39:33,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:39:33,085 INFO L82 PathProgramCache]: Analyzing trace with hash -416382532, now seen corresponding path program 3 times [2021-05-06 03:39:33,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:39:33,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298936463] [2021-05-06 03:39:33,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:39:33,091 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:39:33,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [36556191] [2021-05-06 03:39:33,091 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:39:33,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 03:39:33,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:39:33,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-06 03:39:33,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:39:33,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:33,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:33,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:33,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:33,309 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 57 proven. 4 refuted. 0 times theorem prover too weak. 485 trivial. 0 not checked. [2021-05-06 03:39:33,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:39:33,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298936463] [2021-05-06 03:39:33,309 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:39:33,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36556191] [2021-05-06 03:39:33,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36556191] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:39:33,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:39:33,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-05-06 03:39:33,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306834047] [2021-05-06 03:39:33,310 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 03:39:33,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:39:33,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 03:39:33,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-06 03:39:33,310 INFO L87 Difference]: Start difference. First operand 129 states and 142 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 4 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-05-06 03:39:33,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:39:33,336 INFO L93 Difference]: Finished difference Result 145 states and 164 transitions. [2021-05-06 03:39:33,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 03:39:33,336 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 4 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 109 [2021-05-06 03:39:33,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:39:33,337 INFO L225 Difference]: With dead ends: 145 [2021-05-06 03:39:33,337 INFO L226 Difference]: Without dead ends: 137 [2021-05-06 03:39:33,337 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 7.9ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-06 03:39:33,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-05-06 03:39:33,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2021-05-06 03:39:33,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 85 states have (on average 1.0823529411764705) internal successors, (92), 86 states have internal predecessors, (92), 32 states have call successors, (32), 20 states have call predecessors, (32), 19 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2021-05-06 03:39:33,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 154 transitions. [2021-05-06 03:39:33,346 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 154 transitions. Word has length 109 [2021-05-06 03:39:33,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:39:33,349 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 154 transitions. [2021-05-06 03:39:33,349 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 4 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-05-06 03:39:33,349 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 154 transitions. [2021-05-06 03:39:33,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-05-06 03:39:33,350 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:39:33,350 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:39:33,564 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-06 03:39:33,565 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:39:33,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:39:33,565 INFO L82 PathProgramCache]: Analyzing trace with hash -76721736, now seen corresponding path program 5 times [2021-05-06 03:39:33,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:39:33,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929719871] [2021-05-06 03:39:33,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:39:33,571 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:39:33,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1848231357] [2021-05-06 03:39:33,571 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 [2021-05-06 03:39:33,649 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-06 03:39:33,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:39:33,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-06 03:39:33,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:39:33,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:33,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:33,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:33,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:33,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:33,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:33,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:33,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:33,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:33,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:33,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:33,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:33,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:33,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:33,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:33,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:33,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:33,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:33,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:33,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:33,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:33,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:33,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:33,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:33,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:33,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:33,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:33,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:33,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:33,971 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 32 proven. 39 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2021-05-06 03:39:33,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:39:33,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929719871] [2021-05-06 03:39:33,972 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:39:33,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848231357] [2021-05-06 03:39:33,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848231357] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:39:33,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:39:33,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 03:39:33,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662403745] [2021-05-06 03:39:33,974 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 03:39:33,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:39:33,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 03:39:33,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-05-06 03:39:33,975 INFO L87 Difference]: Start difference. First operand 137 states and 154 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 8 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2021-05-06 03:39:34,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:39:34,268 INFO L93 Difference]: Finished difference Result 169 states and 193 transitions. [2021-05-06 03:39:34,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 03:39:34,268 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 8 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) Word has length 111 [2021-05-06 03:39:34,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:39:34,269 INFO L225 Difference]: With dead ends: 169 [2021-05-06 03:39:34,269 INFO L226 Difference]: Without dead ends: 161 [2021-05-06 03:39:34,270 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 140.3ms TimeCoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-05-06 03:39:34,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-05-06 03:39:34,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 150. [2021-05-06 03:39:34,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 94 states have (on average 1.0851063829787233) internal successors, (102), 95 states have internal predecessors, (102), 34 states have call successors, (34), 22 states have call predecessors, (34), 21 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-06 03:39:34,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 168 transitions. [2021-05-06 03:39:34,282 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 168 transitions. Word has length 111 [2021-05-06 03:39:34,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:39:34,282 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 168 transitions. [2021-05-06 03:39:34,282 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 8 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2021-05-06 03:39:34,282 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 168 transitions. [2021-05-06 03:39:34,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-05-06 03:39:34,283 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:39:34,283 INFO L523 BasicCegarLoop]: trace histogram [18, 17, 17, 5, 5, 5, 5, 5, 5, 5, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:39:34,499 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:39:34,499 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:39:34,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:39:34,500 INFO L82 PathProgramCache]: Analyzing trace with hash 567610840, now seen corresponding path program 6 times [2021-05-06 03:39:34,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:39:34,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701795499] [2021-05-06 03:39:34,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:39:34,505 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:39:34,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1684716504] [2021-05-06 03:39:34,505 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 [2021-05-06 03:39:34,580 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-06 03:39:34,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:39:34,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-06 03:39:34,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:39:34,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:34,776 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 133 proven. 16 refuted. 0 times theorem prover too weak. 481 trivial. 0 not checked. [2021-05-06 03:39:34,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:39:34,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701795499] [2021-05-06 03:39:34,776 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:39:34,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684716504] [2021-05-06 03:39:34,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684716504] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:39:34,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:39:34,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 03:39:34,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907916034] [2021-05-06 03:39:34,777 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 03:39:34,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:39:34,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 03:39:34,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-05-06 03:39:34,777 INFO L87 Difference]: Start difference. First operand 150 states and 168 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-06 03:39:34,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:39:34,899 INFO L93 Difference]: Finished difference Result 176 states and 200 transitions. [2021-05-06 03:39:34,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 03:39:34,899 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) Word has length 115 [2021-05-06 03:39:34,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:39:34,900 INFO L225 Difference]: With dead ends: 176 [2021-05-06 03:39:34,900 INFO L226 Difference]: Without dead ends: 174 [2021-05-06 03:39:34,901 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 60.7ms TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-05-06 03:39:34,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-05-06 03:39:34,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 163. [2021-05-06 03:39:34,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 103 states have (on average 1.0970873786407767) internal successors, (113), 104 states have internal predecessors, (113), 36 states have call successors, (36), 24 states have call predecessors, (36), 23 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2021-05-06 03:39:34,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 183 transitions. [2021-05-06 03:39:34,911 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 183 transitions. Word has length 115 [2021-05-06 03:39:34,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:39:34,911 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 183 transitions. [2021-05-06 03:39:34,911 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-06 03:39:34,911 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 183 transitions. [2021-05-06 03:39:34,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-05-06 03:39:34,912 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:39:34,912 INFO L523 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:39:35,129 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-06 03:39:35,129 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:39:35,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:39:35,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1305935669, now seen corresponding path program 4 times [2021-05-06 03:39:35,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:39:35,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53152908] [2021-05-06 03:39:35,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:39:35,136 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:39:35,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1194478862] [2021-05-06 03:39:35,136 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:39:35,256 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 03:39:35,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:39:35,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 03:39:35,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:39:35,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:35,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:35,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:35,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:35,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:35,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:35,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:35,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:35,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:35,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:35,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:35,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:35,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:35,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:35,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:35,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:35,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:35,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:35,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:35,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:35,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:35,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:35,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:35,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:35,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:35,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:35,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:35,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:35,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:35,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:35,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:35,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:35,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:35,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:35,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:35,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:35,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:35,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:35,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:35,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:35,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:35,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:35,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:35,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:35,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:35,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:35,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:35,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:35,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:35,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:35,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:35,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:35,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:35,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:35,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:35,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:35,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:35,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:35,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:35,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:35,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:35,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:35,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:35,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:35,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:35,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:35,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:35,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:35,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:35,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:35,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:35,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:35,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:35,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:35,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:35,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:35,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:35,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:35,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:35,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:35,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:35,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:35,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:35,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:35,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:35,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:35,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:35,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:35,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:35,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:35,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:35,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:35,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:35,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:35,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:35,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:35,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:35,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:35,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:35,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:35,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:35,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:36,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:36,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:36,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:36,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:36,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:36,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:36,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:36,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:36,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:36,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:36,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:36,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:36,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:36,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:36,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:36,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:36,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:36,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:36,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:36,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:36,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:36,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:36,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:36,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:37,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:37,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:37,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:37,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:37,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:37,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:37,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:37,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:37,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:37,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:37,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:37,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:37,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:37,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:37,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:37,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:37,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:37,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:37,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:37,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:39:37,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:41:35,189 WARN L205 SmtUtils]: Spent 1.95 m on a formula simplification. DAG size of input: 25308 DAG size of output: 24817 [2021-05-06 03:41:39,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:41:41,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:41:43,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:43:36,385 WARN L205 SmtUtils]: Spent 1.87 m on a formula simplification. DAG size of input: 25362 DAG size of output: 24864