/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-new/gauss_sum.i.p+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 00:11:13,546 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 00:11:13,547 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 00:11:13,566 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 00:11:13,583 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 00:11:13,584 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 00:11:13,585 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 00:11:13,586 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 00:11:13,587 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 00:11:13,587 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 00:11:13,590 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 00:11:13,594 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 00:11:13,595 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 00:11:13,596 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 00:11:13,597 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 00:11:13,598 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 00:11:13,603 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 00:11:13,608 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 00:11:13,609 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 00:11:13,609 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 00:11:13,612 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-06 00:11:13,630 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 00:11:13,630 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 00:11:13,631 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 00:11:13,631 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 00:11:13,631 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 00:11:13,632 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 00:11:13,632 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 00:11:13,632 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 00:11:13,632 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 00:11:13,632 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 00:11:13,632 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 00:11:13,632 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 00:11:13,632 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 00:11:13,632 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 00:11:13,632 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 00:11:13,633 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 00:11:13,633 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 00:11:13,633 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 00:11:13,633 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 00:11:13,633 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 00:11:13,633 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 00:11:13,633 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 00:11:13,633 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 00:11:13,633 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 00:11:13,633 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 00:11:13,634 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 00:11:13,634 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 00:11:13,634 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 00:11:13,634 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 00:11:13,877 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 00:11:13,894 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 00:11:13,896 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 00:11:13,897 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 00:11:13,898 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 00:11:13,899 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/gauss_sum.i.p+lhb-reducer.c [2021-05-06 00:11:13,941 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5937ca6fa/4d2da61d9a014548b8eafbbaabfc5f16/FLAGe79a054ac [2021-05-06 00:11:14,279 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 00:11:14,279 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/gauss_sum.i.p+lhb-reducer.c [2021-05-06 00:11:14,284 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5937ca6fa/4d2da61d9a014548b8eafbbaabfc5f16/FLAGe79a054ac [2021-05-06 00:11:14,682 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5937ca6fa/4d2da61d9a014548b8eafbbaabfc5f16 [2021-05-06 00:11:14,684 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 00:11:14,685 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 00:11:14,686 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 00:11:14,686 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 00:11:14,697 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 00:11:14,698 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 12:11:14" (1/1) ... [2021-05-06 00:11:14,699 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f501711 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:11:14, skipping insertion in model container [2021-05-06 00:11:14,699 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 12:11:14" (1/1) ... [2021-05-06 00:11:14,706 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 00:11:14,716 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 00:11:14,803 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-new/gauss_sum.i.p+lhb-reducer.c[1444,1457] [2021-05-06 00:11:14,806 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 00:11:14,811 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 00:11:14,823 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-new/gauss_sum.i.p+lhb-reducer.c[1444,1457] [2021-05-06 00:11:14,824 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 00:11:14,832 INFO L208 MainTranslator]: Completed translation [2021-05-06 00:11:14,833 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:11:14 WrapperNode [2021-05-06 00:11:14,833 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 00:11:14,834 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 00:11:14,834 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 00:11:14,834 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 00:11:14,840 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:11:14" (1/1) ... [2021-05-06 00:11:14,840 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:11:14" (1/1) ... [2021-05-06 00:11:14,844 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:11:14" (1/1) ... [2021-05-06 00:11:14,845 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:11:14" (1/1) ... [2021-05-06 00:11:14,871 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:11:14" (1/1) ... [2021-05-06 00:11:14,882 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:11:14" (1/1) ... [2021-05-06 00:11:14,882 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:11:14" (1/1) ... [2021-05-06 00:11:14,883 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 00:11:14,884 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 00:11:14,884 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 00:11:14,884 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 00:11:14,885 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:11:14" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 00:11:14,936 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 00:11:14,937 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 00:11:14,937 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 00:11:14,937 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 00:11:14,938 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 00:11:14,938 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 00:11:14,938 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 00:11:14,938 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 00:11:14,939 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 00:11:14,939 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 00:11:14,939 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 00:11:14,939 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 00:11:14,940 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 00:11:14,940 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 00:11:14,941 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 00:11:14,941 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 00:11:14,941 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 00:11:14,941 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 00:11:14,941 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 00:11:15,185 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 00:11:15,185 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-05-06 00:11:15,186 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 12:11:15 BoogieIcfgContainer [2021-05-06 00:11:15,186 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 00:11:15,187 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 00:11:15,187 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 00:11:15,205 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 00:11:15,205 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 12:11:14" (1/3) ... [2021-05-06 00:11:15,206 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67d0a76f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 12:11:15, skipping insertion in model container [2021-05-06 00:11:15,206 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 12:11:14" (2/3) ... [2021-05-06 00:11:15,206 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67d0a76f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 12:11:15, skipping insertion in model container [2021-05-06 00:11:15,206 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 12:11:15" (3/3) ... [2021-05-06 00:11:15,207 INFO L111 eAbstractionObserver]: Analyzing ICFG gauss_sum.i.p+lhb-reducer.c [2021-05-06 00:11:15,211 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 00:11:15,213 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 00:11:15,223 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 00:11:15,246 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 00:11:15,246 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 00:11:15,246 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 00:11:15,247 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 00:11:15,247 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 00:11:15,247 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 00:11:15,247 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 00:11:15,247 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 00:11:15,262 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 16 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 00:11:15,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-06 00:11:15,265 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:11:15,265 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:11:15,266 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:11:15,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:11:15,270 INFO L82 PathProgramCache]: Analyzing trace with hash -1579444895, now seen corresponding path program 1 times [2021-05-06 00:11:15,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:11:15,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167489115] [2021-05-06 00:11:15,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:11:15,376 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:11:15,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [757503355] [2021-05-06 00:11:15,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:11:15,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 00:11:15,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-06 00:11:15,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:11:15,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:15,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:15,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:15,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:15,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:11:15,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:11:15,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167489115] [2021-05-06 00:11:15,772 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:11:15,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757503355] [2021-05-06 00:11:15,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757503355] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 00:11:15,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 00:11:15,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-06 00:11:15,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795328374] [2021-05-06 00:11:15,776 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 00:11:15,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:11:15,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 00:11:15,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-05-06 00:11:15,784 INFO L87 Difference]: Start difference. First operand has 21 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 16 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:15,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:11:15,967 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2021-05-06 00:11:15,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 00:11:15,968 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-05-06 00:11:15,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:11:15,972 INFO L225 Difference]: With dead ends: 41 [2021-05-06 00:11:15,972 INFO L226 Difference]: Without dead ends: 18 [2021-05-06 00:11:15,974 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 157.9ms TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 00:11:16,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-05-06 00:11:16,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-05-06 00:11:16,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:16,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2021-05-06 00:11:16,009 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2021-05-06 00:11:16,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:11:16,009 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2021-05-06 00:11:16,010 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:16,010 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2021-05-06 00:11:16,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 00:11:16,010 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:11:16,010 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 00:11:16,226 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-05-06 00:11:16,227 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:11:16,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:11:16,227 INFO L82 PathProgramCache]: Analyzing trace with hash -1718213942, now seen corresponding path program 1 times [2021-05-06 00:11:16,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:11:16,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826835824] [2021-05-06 00:11:16,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:11:16,242 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:11:16,243 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1629825514] [2021-05-06 00:11:16,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:11:16,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 00:11:16,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-06 00:11:16,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:11:16,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:16,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:16,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:16,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:16,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:11:16,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:11:16,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826835824] [2021-05-06 00:11:16,452 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:11:16,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629825514] [2021-05-06 00:11:16,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629825514] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:11:16,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:11:16,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 00:11:16,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258438298] [2021-05-06 00:11:16,453 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 00:11:16,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:11:16,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 00:11:16,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-05-06 00:11:16,454 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand has 10 states, 10 states have (on average 1.4) internal successors, (14), 10 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:16,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:11:16,503 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2021-05-06 00:11:16,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 00:11:16,504 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.4) internal successors, (14), 10 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-05-06 00:11:16,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:11:16,504 INFO L225 Difference]: With dead ends: 22 [2021-05-06 00:11:16,505 INFO L226 Difference]: Without dead ends: 19 [2021-05-06 00:11:16,505 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 65.1ms TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-05-06 00:11:16,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-05-06 00:11:16,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-05-06 00:11:16,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:16,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2021-05-06 00:11:16,508 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2021-05-06 00:11:16,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:11:16,508 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2021-05-06 00:11:16,508 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.4) internal successors, (14), 10 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:16,508 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2021-05-06 00:11:16,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 00:11:16,508 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:11:16,508 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:11:16,727 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:11:16,727 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:11:16,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:11:16,728 INFO L82 PathProgramCache]: Analyzing trace with hash -1725087103, now seen corresponding path program 2 times [2021-05-06 00:11:16,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:11:16,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414071437] [2021-05-06 00:11:16,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:11:16,755 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:11:16,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [177115691] [2021-05-06 00:11:16,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:11:16,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 00:11:16,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:11:16,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-06 00:11:16,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:11:16,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:16,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:16,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:16,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:17,001 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:11:17,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:11:17,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414071437] [2021-05-06 00:11:17,001 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:11:17,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177115691] [2021-05-06 00:11:17,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177115691] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:11:17,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:11:17,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 00:11:17,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984175419] [2021-05-06 00:11:17,002 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 00:11:17,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:11:17,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 00:11:17,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-05-06 00:11:17,003 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:17,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:11:17,085 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2021-05-06 00:11:17,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 00:11:17,086 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-05-06 00:11:17,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:11:17,087 INFO L225 Difference]: With dead ends: 23 [2021-05-06 00:11:17,087 INFO L226 Difference]: Without dead ends: 20 [2021-05-06 00:11:17,087 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 101.1ms TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-05-06 00:11:17,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-05-06 00:11:17,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-05-06 00:11:17,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 16 states have (on average 1.0625) internal successors, (17), 16 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:17,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2021-05-06 00:11:17,093 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2021-05-06 00:11:17,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:11:17,094 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2021-05-06 00:11:17,094 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:17,094 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2021-05-06 00:11:17,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-06 00:11:17,094 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:11:17,094 INFO L523 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:11:17,310 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:11:17,310 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:11:17,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:11:17,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1938155094, now seen corresponding path program 3 times [2021-05-06 00:11:17,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:11:17,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910127639] [2021-05-06 00:11:17,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:11:17,327 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:11:17,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1715452890] [2021-05-06 00:11:17,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:11:17,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 00:11:17,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:11:17,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-06 00:11:17,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:11:17,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:17,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:17,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:17,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:17,562 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:11:17,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:11:17,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910127639] [2021-05-06 00:11:17,562 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:11:17,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715452890] [2021-05-06 00:11:17,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715452890] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:11:17,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:11:17,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 00:11:17,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719490790] [2021-05-06 00:11:17,564 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 00:11:17,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:11:17,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 00:11:17,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-05-06 00:11:17,566 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand has 12 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:17,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:11:17,648 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2021-05-06 00:11:17,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 00:11:17,648 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-05-06 00:11:17,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:11:17,649 INFO L225 Difference]: With dead ends: 24 [2021-05-06 00:11:17,650 INFO L226 Difference]: Without dead ends: 21 [2021-05-06 00:11:17,651 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 105.8ms TimeCoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-05-06 00:11:17,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-05-06 00:11:17,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-05-06 00:11:17,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 17 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:17,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2021-05-06 00:11:17,656 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2021-05-06 00:11:17,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:11:17,656 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2021-05-06 00:11:17,657 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:17,657 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2021-05-06 00:11:17,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-06 00:11:17,657 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:11:17,658 INFO L523 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:11:17,872 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:11:17,873 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:11:17,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:11:17,873 INFO L82 PathProgramCache]: Analyzing trace with hash 46671777, now seen corresponding path program 4 times [2021-05-06 00:11:17,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:11:17,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520684502] [2021-05-06 00:11:17,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:11:17,886 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:11:17,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1110444895] [2021-05-06 00:11:17,886 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:11:17,934 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 00:11:17,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:11:17,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-06 00:11:17,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:11:18,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:18,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:18,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:18,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:18,110 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:11:18,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:11:18,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520684502] [2021-05-06 00:11:18,112 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:11:18,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110444895] [2021-05-06 00:11:18,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110444895] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:11:18,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:11:18,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 00:11:18,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245124794] [2021-05-06 00:11:18,113 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 00:11:18,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:11:18,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 00:11:18,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2021-05-06 00:11:18,114 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:18,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:11:18,186 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2021-05-06 00:11:18,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 00:11:18,187 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-05-06 00:11:18,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:11:18,187 INFO L225 Difference]: With dead ends: 25 [2021-05-06 00:11:18,187 INFO L226 Difference]: Without dead ends: 22 [2021-05-06 00:11:18,188 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 113.8ms TimeCoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-05-06 00:11:18,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-05-06 00:11:18,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-05-06 00:11:18,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 18 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:18,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2021-05-06 00:11:18,190 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2021-05-06 00:11:18,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:11:18,190 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2021-05-06 00:11:18,190 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:18,190 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2021-05-06 00:11:18,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-06 00:11:18,190 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:11:18,190 INFO L523 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:11:18,408 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-06 00:11:18,409 INFO L428 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:11:18,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:11:18,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1446762634, now seen corresponding path program 5 times [2021-05-06 00:11:18,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:11:18,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210396981] [2021-05-06 00:11:18,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:11:18,417 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:11:18,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [437255926] [2021-05-06 00:11:18,418 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:11:18,461 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-06 00:11:18,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:11:18,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 48 conjunts are in the unsatisfiable core [2021-05-06 00:11:18,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:11:18,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:18,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:18,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:18,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:18,611 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:11:18,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:11:18,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210396981] [2021-05-06 00:11:18,612 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:11:18,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437255926] [2021-05-06 00:11:18,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437255926] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:11:18,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:11:18,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 00:11:18,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513288892] [2021-05-06 00:11:18,612 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 00:11:18,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:11:18,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 00:11:18,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2021-05-06 00:11:18,613 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand has 14 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:18,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:11:18,733 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2021-05-06 00:11:18,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 00:11:18,733 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-05-06 00:11:18,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:11:18,734 INFO L225 Difference]: With dead ends: 26 [2021-05-06 00:11:18,736 INFO L226 Difference]: Without dead ends: 23 [2021-05-06 00:11:18,737 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 105.3ms TimeCoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-05-06 00:11:18,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-05-06 00:11:18,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-05-06 00:11:18,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 19 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:18,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2021-05-06 00:11:18,741 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2021-05-06 00:11:18,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:11:18,741 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2021-05-06 00:11:18,742 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:18,742 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2021-05-06 00:11:18,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 00:11:18,742 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:11:18,742 INFO L523 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:11:18,956 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:11:18,957 INFO L428 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:11:18,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:11:18,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1899906241, now seen corresponding path program 6 times [2021-05-06 00:11:18,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:11:18,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818090065] [2021-05-06 00:11:18,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:11:18,965 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:11:18,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1058366766] [2021-05-06 00:11:18,966 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:11:19,019 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-06 00:11:19,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:11:19,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 52 conjunts are in the unsatisfiable core [2021-05-06 00:11:19,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:11:19,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:19,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:19,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:19,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:19,189 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:11:19,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:11:19,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818090065] [2021-05-06 00:11:19,190 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:11:19,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058366766] [2021-05-06 00:11:19,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058366766] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:11:19,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:11:19,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-06 00:11:19,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056505644] [2021-05-06 00:11:19,190 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 00:11:19,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:11:19,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 00:11:19,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2021-05-06 00:11:19,191 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand has 15 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:19,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:11:19,283 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2021-05-06 00:11:19,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 00:11:19,283 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2021-05-06 00:11:19,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:11:19,283 INFO L225 Difference]: With dead ends: 27 [2021-05-06 00:11:19,283 INFO L226 Difference]: Without dead ends: 24 [2021-05-06 00:11:19,284 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 106.7ms TimeCoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-05-06 00:11:19,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-05-06 00:11:19,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-05-06 00:11:19,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 20 states have (on average 1.05) internal successors, (21), 20 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:19,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2021-05-06 00:11:19,286 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2021-05-06 00:11:19,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:11:19,286 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2021-05-06 00:11:19,286 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:19,286 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2021-05-06 00:11:19,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 00:11:19,287 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:11:19,287 INFO L523 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:11:19,492 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:11:19,496 INFO L428 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:11:19,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:11:19,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1232511126, now seen corresponding path program 7 times [2021-05-06 00:11:19,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:11:19,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977344364] [2021-05-06 00:11:19,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:11:19,504 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:11:19,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [734980778] [2021-05-06 00:11:19,504 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:11:19,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 00:11:19,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 56 conjunts are in the unsatisfiable core [2021-05-06 00:11:19,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:11:19,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:19,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:19,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:19,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:19,729 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:11:19,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:11:19,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977344364] [2021-05-06 00:11:19,730 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:11:19,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734980778] [2021-05-06 00:11:19,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734980778] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:11:19,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:11:19,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-06 00:11:19,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437247939] [2021-05-06 00:11:19,730 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-06 00:11:19,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:11:19,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-06 00:11:19,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2021-05-06 00:11:19,731 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand has 16 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:19,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:11:19,845 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2021-05-06 00:11:19,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 00:11:19,846 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2021-05-06 00:11:19,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:11:19,846 INFO L225 Difference]: With dead ends: 28 [2021-05-06 00:11:19,846 INFO L226 Difference]: Without dead ends: 25 [2021-05-06 00:11:19,846 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 125.7ms TimeCoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2021-05-06 00:11:19,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-06 00:11:19,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-05-06 00:11:19,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 21 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:19,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2021-05-06 00:11:19,849 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2021-05-06 00:11:19,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:11:19,849 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2021-05-06 00:11:19,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:19,849 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2021-05-06 00:11:19,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-06 00:11:19,849 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:11:19,849 INFO L523 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:11:20,065 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-06 00:11:20,065 INFO L428 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:11:20,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:11:20,066 INFO L82 PathProgramCache]: Analyzing trace with hash 446798305, now seen corresponding path program 8 times [2021-05-06 00:11:20,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:11:20,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154478693] [2021-05-06 00:11:20,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:11:20,073 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:11:20,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1741523200] [2021-05-06 00:11:20,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:11:20,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 00:11:20,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:11:20,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 60 conjunts are in the unsatisfiable core [2021-05-06 00:11:20,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:11:20,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:20,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:20,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:20,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:20,324 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:11:20,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:11:20,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154478693] [2021-05-06 00:11:20,324 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:11:20,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741523200] [2021-05-06 00:11:20,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741523200] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:11:20,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:11:20,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-06 00:11:20,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281583228] [2021-05-06 00:11:20,324 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-06 00:11:20,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:11:20,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-06 00:11:20,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2021-05-06 00:11:20,325 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand has 17 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:20,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:11:20,478 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2021-05-06 00:11:20,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-06 00:11:20,479 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2021-05-06 00:11:20,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:11:20,479 INFO L225 Difference]: With dead ends: 29 [2021-05-06 00:11:20,479 INFO L226 Difference]: Without dead ends: 26 [2021-05-06 00:11:20,479 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 152.5ms TimeCoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2021-05-06 00:11:20,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-06 00:11:20,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-05-06 00:11:20,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 22 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:20,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2021-05-06 00:11:20,482 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2021-05-06 00:11:20,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:11:20,482 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2021-05-06 00:11:20,482 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:20,482 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2021-05-06 00:11:20,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-06 00:11:20,482 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:11:20,482 INFO L523 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:11:20,692 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:11:20,693 INFO L428 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:11:20,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:11:20,693 INFO L82 PathProgramCache]: Analyzing trace with hash 965783114, now seen corresponding path program 9 times [2021-05-06 00:11:20,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:11:20,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067621375] [2021-05-06 00:11:20,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:11:20,701 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:11:20,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [129783331] [2021-05-06 00:11:20,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:11:20,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-06 00:11:20,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:11:20,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 64 conjunts are in the unsatisfiable core [2021-05-06 00:11:20,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:11:20,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:20,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:20,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:20,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:20,979 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:11:20,979 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:11:20,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067621375] [2021-05-06 00:11:20,979 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:11:20,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129783331] [2021-05-06 00:11:20,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129783331] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:11:20,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:11:20,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-06 00:11:20,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718822927] [2021-05-06 00:11:20,980 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-06 00:11:20,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:11:20,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-06 00:11:20,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2021-05-06 00:11:20,981 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand has 18 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:21,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:11:21,127 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2021-05-06 00:11:21,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-06 00:11:21,128 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-05-06 00:11:21,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:11:21,128 INFO L225 Difference]: With dead ends: 30 [2021-05-06 00:11:21,128 INFO L226 Difference]: Without dead ends: 27 [2021-05-06 00:11:21,128 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 167.8ms TimeCoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2021-05-06 00:11:21,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-06 00:11:21,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-06 00:11:21,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:21,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2021-05-06 00:11:21,130 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2021-05-06 00:11:21,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:11:21,131 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2021-05-06 00:11:21,131 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:21,131 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2021-05-06 00:11:21,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-06 00:11:21,131 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:11:21,131 INFO L523 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:11:21,332 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-06 00:11:21,332 INFO L428 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:11:21,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:11:21,332 INFO L82 PathProgramCache]: Analyzing trace with hash -125556991, now seen corresponding path program 10 times [2021-05-06 00:11:21,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:11:21,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806707432] [2021-05-06 00:11:21,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:11:21,340 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:11:21,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2051349836] [2021-05-06 00:11:21,340 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:11:21,388 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 00:11:21,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:11:21,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 68 conjunts are in the unsatisfiable core [2021-05-06 00:11:21,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:11:21,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:21,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:21,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:21,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:21,648 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:11:21,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:11:21,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806707432] [2021-05-06 00:11:21,649 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:11:21,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051349836] [2021-05-06 00:11:21,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051349836] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:11:21,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:11:21,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-05-06 00:11:21,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100540007] [2021-05-06 00:11:21,649 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-06 00:11:21,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:11:21,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-06 00:11:21,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2021-05-06 00:11:21,650 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand has 19 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:21,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:11:21,803 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2021-05-06 00:11:21,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-06 00:11:21,804 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2021-05-06 00:11:21,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:11:21,804 INFO L225 Difference]: With dead ends: 31 [2021-05-06 00:11:21,804 INFO L226 Difference]: Without dead ends: 28 [2021-05-06 00:11:21,805 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 181.1ms TimeCoverageRelationStatistics Valid=39, Invalid=341, Unknown=0, NotChecked=0, Total=380 [2021-05-06 00:11:21,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-05-06 00:11:21,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-05-06 00:11:21,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 24 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:21,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2021-05-06 00:11:21,807 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2021-05-06 00:11:21,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:11:21,807 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2021-05-06 00:11:21,807 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:21,807 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2021-05-06 00:11:21,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-06 00:11:21,808 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:11:21,808 INFO L523 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:11:22,012 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-05-06 00:11:22,013 INFO L428 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:11:22,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:11:22,013 INFO L82 PathProgramCache]: Analyzing trace with hash 402638122, now seen corresponding path program 11 times [2021-05-06 00:11:22,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:11:22,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952967518] [2021-05-06 00:11:22,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:11:22,023 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:11:22,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1670947126] [2021-05-06 00:11:22,023 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:11:22,075 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-06 00:11:22,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:11:22,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 72 conjunts are in the unsatisfiable core [2021-05-06 00:11:22,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:11:22,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:22,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:22,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:22,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:22,313 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:11:22,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:11:22,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952967518] [2021-05-06 00:11:22,314 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:11:22,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670947126] [2021-05-06 00:11:22,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670947126] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:11:22,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:11:22,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-05-06 00:11:22,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340262524] [2021-05-06 00:11:22,314 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-06 00:11:22,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:11:22,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-06 00:11:22,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2021-05-06 00:11:22,315 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand has 20 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:22,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:11:22,469 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2021-05-06 00:11:22,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-06 00:11:22,469 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2021-05-06 00:11:22,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:11:22,470 INFO L225 Difference]: With dead ends: 32 [2021-05-06 00:11:22,470 INFO L226 Difference]: Without dead ends: 29 [2021-05-06 00:11:22,470 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 196.3ms TimeCoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2021-05-06 00:11:22,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-06 00:11:22,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-05-06 00:11:22,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 25 states have (on average 1.04) internal successors, (26), 25 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:22,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2021-05-06 00:11:22,472 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2021-05-06 00:11:22,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:11:22,473 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2021-05-06 00:11:22,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:22,473 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2021-05-06 00:11:22,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 00:11:22,473 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:11:22,473 INFO L523 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:11:22,682 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:11:22,682 INFO L428 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:11:22,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:11:22,682 INFO L82 PathProgramCache]: Analyzing trace with hash -403182559, now seen corresponding path program 12 times [2021-05-06 00:11:22,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:11:22,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561282924] [2021-05-06 00:11:22,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:11:22,706 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:11:22,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1667602565] [2021-05-06 00:11:22,706 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:11:22,763 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-06 00:11:22,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:11:22,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 76 conjunts are in the unsatisfiable core [2021-05-06 00:11:22,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:11:23,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:23,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:23,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:23,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:23,048 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:11:23,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:11:23,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561282924] [2021-05-06 00:11:23,048 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:11:23,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667602565] [2021-05-06 00:11:23,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667602565] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:11:23,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:11:23,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-05-06 00:11:23,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895493777] [2021-05-06 00:11:23,049 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-06 00:11:23,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:11:23,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-06 00:11:23,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2021-05-06 00:11:23,050 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand has 21 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:23,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:11:23,240 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2021-05-06 00:11:23,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-06 00:11:23,241 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2021-05-06 00:11:23,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:11:23,241 INFO L225 Difference]: With dead ends: 33 [2021-05-06 00:11:23,241 INFO L226 Difference]: Without dead ends: 30 [2021-05-06 00:11:23,241 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 226.8ms TimeCoverageRelationStatistics Valid=43, Invalid=419, Unknown=0, NotChecked=0, Total=462 [2021-05-06 00:11:23,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-05-06 00:11:23,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-05-06 00:11:23,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:23,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2021-05-06 00:11:23,243 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2021-05-06 00:11:23,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:11:23,244 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2021-05-06 00:11:23,244 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:23,244 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2021-05-06 00:11:23,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-06 00:11:23,244 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:11:23,244 INFO L523 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:11:23,457 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-06 00:11:23,458 INFO L428 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:11:23,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:11:23,458 INFO L82 PathProgramCache]: Analyzing trace with hash 386180106, now seen corresponding path program 13 times [2021-05-06 00:11:23,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:11:23,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935542314] [2021-05-06 00:11:23,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:11:23,464 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:11:23,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [502882191] [2021-05-06 00:11:23,464 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:11:23,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 00:11:23,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 80 conjunts are in the unsatisfiable core [2021-05-06 00:11:23,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:11:23,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:23,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:23,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:23,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:23,813 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:11:23,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:11:23,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935542314] [2021-05-06 00:11:23,813 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:11:23,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502882191] [2021-05-06 00:11:23,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502882191] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:11:23,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:11:23,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-05-06 00:11:23,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037489506] [2021-05-06 00:11:23,814 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-06 00:11:23,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:11:23,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-06 00:11:23,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2021-05-06 00:11:23,815 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand has 22 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:24,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:11:24,030 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2021-05-06 00:11:24,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-06 00:11:24,030 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2021-05-06 00:11:24,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:11:24,030 INFO L225 Difference]: With dead ends: 34 [2021-05-06 00:11:24,031 INFO L226 Difference]: Without dead ends: 31 [2021-05-06 00:11:24,031 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 232.3ms TimeCoverageRelationStatistics Valid=45, Invalid=461, Unknown=0, NotChecked=0, Total=506 [2021-05-06 00:11:24,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-06 00:11:24,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-05-06 00:11:24,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 27 states have (on average 1.037037037037037) internal successors, (28), 27 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:24,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2021-05-06 00:11:24,033 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2021-05-06 00:11:24,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:11:24,033 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2021-05-06 00:11:24,033 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:24,033 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2021-05-06 00:11:24,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-06 00:11:24,034 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:11:24,034 INFO L523 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:11:24,237 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:11:24,237 INFO L428 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:11:24,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:11:24,239 INFO L82 PathProgramCache]: Analyzing trace with hash -913381055, now seen corresponding path program 14 times [2021-05-06 00:11:24,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:11:24,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421801601] [2021-05-06 00:11:24,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:11:24,245 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:11:24,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [639373773] [2021-05-06 00:11:24,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:11:24,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 00:11:24,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:11:24,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 84 conjunts are in the unsatisfiable core [2021-05-06 00:11:24,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:11:24,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:24,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:24,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:24,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:24,615 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:11:24,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:11:24,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421801601] [2021-05-06 00:11:24,616 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:11:24,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639373773] [2021-05-06 00:11:24,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639373773] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:11:24,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:11:24,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-05-06 00:11:24,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900997148] [2021-05-06 00:11:24,616 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-06 00:11:24,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:11:24,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-06 00:11:24,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2021-05-06 00:11:24,617 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand has 23 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:24,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:11:24,846 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2021-05-06 00:11:24,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-06 00:11:24,846 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2021-05-06 00:11:24,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:11:24,847 INFO L225 Difference]: With dead ends: 35 [2021-05-06 00:11:24,847 INFO L226 Difference]: Without dead ends: 32 [2021-05-06 00:11:24,847 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 256.4ms TimeCoverageRelationStatistics Valid=47, Invalid=505, Unknown=0, NotChecked=0, Total=552 [2021-05-06 00:11:24,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-06 00:11:24,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-06 00:11:24,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 28 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:24,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2021-05-06 00:11:24,849 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2021-05-06 00:11:24,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:11:24,849 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2021-05-06 00:11:24,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:24,849 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2021-05-06 00:11:24,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-06 00:11:24,850 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:11:24,850 INFO L523 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:11:25,052 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-05-06 00:11:25,053 INFO L428 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:11:25,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:11:25,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1749895914, now seen corresponding path program 15 times [2021-05-06 00:11:25,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:11:25,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617737883] [2021-05-06 00:11:25,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:11:25,059 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:11:25,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [234718458] [2021-05-06 00:11:25,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:11:25,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-05-06 00:11:25,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:11:25,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 88 conjunts are in the unsatisfiable core [2021-05-06 00:11:25,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:11:25,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:25,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:25,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:25,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:25,443 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:11:25,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:11:25,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617737883] [2021-05-06 00:11:25,443 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:11:25,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234718458] [2021-05-06 00:11:25,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234718458] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:11:25,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:11:25,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2021-05-06 00:11:25,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296551141] [2021-05-06 00:11:25,443 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-06 00:11:25,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:11:25,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-06 00:11:25,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2021-05-06 00:11:25,444 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand has 24 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:25,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:11:25,684 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2021-05-06 00:11:25,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-06 00:11:25,685 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2021-05-06 00:11:25,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:11:25,685 INFO L225 Difference]: With dead ends: 36 [2021-05-06 00:11:25,685 INFO L226 Difference]: Without dead ends: 33 [2021-05-06 00:11:25,685 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 273.3ms TimeCoverageRelationStatistics Valid=49, Invalid=551, Unknown=0, NotChecked=0, Total=600 [2021-05-06 00:11:25,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-06 00:11:25,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-06 00:11:25,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 29 states have (on average 1.0344827586206897) internal successors, (30), 29 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:25,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2021-05-06 00:11:25,688 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2021-05-06 00:11:25,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:11:25,688 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2021-05-06 00:11:25,688 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:25,688 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2021-05-06 00:11:25,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-06 00:11:25,689 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:11:25,689 INFO L523 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:11:25,893 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:11:25,893 INFO L428 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:11:25,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:11:25,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1587863967, now seen corresponding path program 16 times [2021-05-06 00:11:25,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:11:25,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246437755] [2021-05-06 00:11:25,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:11:25,899 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:11:25,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [313586586] [2021-05-06 00:11:25,899 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:11:25,954 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 00:11:25,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:11:25,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 92 conjunts are in the unsatisfiable core [2021-05-06 00:11:25,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:11:26,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:26,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:26,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:26,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:26,306 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:11:26,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:11:26,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246437755] [2021-05-06 00:11:26,306 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:11:26,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313586586] [2021-05-06 00:11:26,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313586586] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:11:26,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:11:26,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2021-05-06 00:11:26,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332870109] [2021-05-06 00:11:26,307 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-06 00:11:26,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:11:26,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-06 00:11:26,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2021-05-06 00:11:26,307 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand has 25 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:26,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:11:26,559 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2021-05-06 00:11:26,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-06 00:11:26,559 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2021-05-06 00:11:26,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:11:26,559 INFO L225 Difference]: With dead ends: 37 [2021-05-06 00:11:26,559 INFO L226 Difference]: Without dead ends: 34 [2021-05-06 00:11:26,560 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 290.2ms TimeCoverageRelationStatistics Valid=51, Invalid=599, Unknown=0, NotChecked=0, Total=650 [2021-05-06 00:11:26,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-06 00:11:26,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-05-06 00:11:26,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 30 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:26,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2021-05-06 00:11:26,563 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2021-05-06 00:11:26,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:11:26,563 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2021-05-06 00:11:26,563 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:26,563 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2021-05-06 00:11:26,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 00:11:26,564 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:11:26,564 INFO L523 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:11:26,768 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-05-06 00:11:26,769 INFO L428 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:11:26,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:11:26,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1979205174, now seen corresponding path program 17 times [2021-05-06 00:11:26,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:11:26,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078525906] [2021-05-06 00:11:26,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:11:26,776 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:11:26,776 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [261975033] [2021-05-06 00:11:26,776 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:11:26,826 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-05-06 00:11:26,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:11:26,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 96 conjunts are in the unsatisfiable core [2021-05-06 00:11:26,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:11:27,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:27,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:27,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:27,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:27,208 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:11:27,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:11:27,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078525906] [2021-05-06 00:11:27,208 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:11:27,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261975033] [2021-05-06 00:11:27,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261975033] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:11:27,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:11:27,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2021-05-06 00:11:27,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298629599] [2021-05-06 00:11:27,211 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-06 00:11:27,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:11:27,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-06 00:11:27,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2021-05-06 00:11:27,212 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand has 26 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:27,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:11:27,493 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2021-05-06 00:11:27,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-06 00:11:27,494 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2021-05-06 00:11:27,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:11:27,494 INFO L225 Difference]: With dead ends: 38 [2021-05-06 00:11:27,494 INFO L226 Difference]: Without dead ends: 35 [2021-05-06 00:11:27,495 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 305.4ms TimeCoverageRelationStatistics Valid=53, Invalid=649, Unknown=0, NotChecked=0, Total=702 [2021-05-06 00:11:27,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-06 00:11:27,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-06 00:11:27,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:27,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2021-05-06 00:11:27,499 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2021-05-06 00:11:27,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:11:27,500 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2021-05-06 00:11:27,500 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:27,500 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2021-05-06 00:11:27,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-06 00:11:27,500 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:11:27,500 INFO L523 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:11:27,716 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-05-06 00:11:27,717 INFO L428 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:11:27,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:11:27,717 INFO L82 PathProgramCache]: Analyzing trace with hash -1225880703, now seen corresponding path program 18 times [2021-05-06 00:11:27,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:11:27,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425080942] [2021-05-06 00:11:27,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:11:27,723 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:11:27,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [725491339] [2021-05-06 00:11:27,723 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:11:27,782 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-05-06 00:11:27,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:11:27,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 101 conjunts are in the unsatisfiable core [2021-05-06 00:11:27,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:11:28,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:28,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:28,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:28,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:28,210 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:11:28,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:11:28,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425080942] [2021-05-06 00:11:28,210 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:11:28,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725491339] [2021-05-06 00:11:28,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725491339] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:11:28,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:11:28,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2021-05-06 00:11:28,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954594845] [2021-05-06 00:11:28,212 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-06 00:11:28,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:11:28,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-06 00:11:28,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2021-05-06 00:11:28,212 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand has 28 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:28,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:11:28,510 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2021-05-06 00:11:28,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-06 00:11:28,511 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2021-05-06 00:11:28,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:11:28,511 INFO L225 Difference]: With dead ends: 39 [2021-05-06 00:11:28,511 INFO L226 Difference]: Without dead ends: 36 [2021-05-06 00:11:28,511 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 373.7ms TimeCoverageRelationStatistics Valid=82, Invalid=730, Unknown=0, NotChecked=0, Total=812 [2021-05-06 00:11:28,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-06 00:11:28,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-05-06 00:11:28,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 32 states have (on average 1.03125) internal successors, (33), 32 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:28,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2021-05-06 00:11:28,514 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2021-05-06 00:11:28,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:11:28,514 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2021-05-06 00:11:28,514 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:28,514 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2021-05-06 00:11:28,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-06 00:11:28,514 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:11:28,514 INFO L523 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:11:28,720 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:11:28,721 INFO L428 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:11:28,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:11:28,721 INFO L82 PathProgramCache]: Analyzing trace with hash 652341418, now seen corresponding path program 19 times [2021-05-06 00:11:28,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:11:28,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766442663] [2021-05-06 00:11:28,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:11:28,726 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:11:28,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1937414017] [2021-05-06 00:11:28,726 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:11:28,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 00:11:28,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 104 conjunts are in the unsatisfiable core [2021-05-06 00:11:28,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:11:29,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:29,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:29,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:29,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:29,188 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:11:29,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:11:29,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766442663] [2021-05-06 00:11:29,188 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:11:29,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937414017] [2021-05-06 00:11:29,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937414017] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:11:29,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:11:29,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2021-05-06 00:11:29,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437659000] [2021-05-06 00:11:29,188 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-06 00:11:29,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:11:29,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-06 00:11:29,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2021-05-06 00:11:29,189 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand has 28 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 28 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:29,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:11:29,485 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2021-05-06 00:11:29,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-06 00:11:29,485 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 28 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2021-05-06 00:11:29,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:11:29,485 INFO L225 Difference]: With dead ends: 40 [2021-05-06 00:11:29,485 INFO L226 Difference]: Without dead ends: 37 [2021-05-06 00:11:29,486 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 349.1ms TimeCoverageRelationStatistics Valid=57, Invalid=755, Unknown=0, NotChecked=0, Total=812 [2021-05-06 00:11:29,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-05-06 00:11:29,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-05-06 00:11:29,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 33 states have (on average 1.0303030303030303) internal successors, (34), 33 states have internal predecessors, (34), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:29,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2021-05-06 00:11:29,488 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2021-05-06 00:11:29,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:11:29,488 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2021-05-06 00:11:29,488 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 28 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:29,488 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2021-05-06 00:11:29,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-06 00:11:29,488 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:11:29,489 INFO L523 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:11:29,696 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-05-06 00:11:29,697 INFO L428 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:11:29,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:11:29,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1252314975, now seen corresponding path program 20 times [2021-05-06 00:11:29,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:11:29,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525980468] [2021-05-06 00:11:29,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:11:29,703 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:11:29,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1074130599] [2021-05-06 00:11:29,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:11:29,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 00:11:29,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:11:29,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 108 conjunts are in the unsatisfiable core [2021-05-06 00:11:29,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:11:30,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:30,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:30,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:30,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:30,182 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:11:30,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:11:30,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525980468] [2021-05-06 00:11:30,182 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:11:30,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074130599] [2021-05-06 00:11:30,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074130599] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:11:30,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:11:30,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2021-05-06 00:11:30,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010502954] [2021-05-06 00:11:30,183 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-06 00:11:30,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:11:30,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-06 00:11:30,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2021-05-06 00:11:30,184 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand has 29 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 29 states have internal predecessors, (33), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:30,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:11:30,490 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2021-05-06 00:11:30,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-06 00:11:30,490 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 29 states have internal predecessors, (33), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2021-05-06 00:11:30,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:11:30,490 INFO L225 Difference]: With dead ends: 41 [2021-05-06 00:11:30,490 INFO L226 Difference]: Without dead ends: 38 [2021-05-06 00:11:30,491 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 361.1ms TimeCoverageRelationStatistics Valid=59, Invalid=811, Unknown=0, NotChecked=0, Total=870 [2021-05-06 00:11:30,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-06 00:11:30,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-05-06 00:11:30,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 34 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:30,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2021-05-06 00:11:30,493 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2021-05-06 00:11:30,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:11:30,493 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2021-05-06 00:11:30,493 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 29 states have internal predecessors, (33), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:30,493 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2021-05-06 00:11:30,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-06 00:11:30,493 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:11:30,493 INFO L523 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:11:30,700 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:11:30,700 INFO L428 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:11:30,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:11:30,700 INFO L82 PathProgramCache]: Analyzing trace with hash -167121014, now seen corresponding path program 21 times [2021-05-06 00:11:30,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:11:30,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727675956] [2021-05-06 00:11:30,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:11:30,707 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:11:30,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [535066525] [2021-05-06 00:11:30,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:11:30,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-05-06 00:11:30,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:11:30,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 113 conjunts are in the unsatisfiable core [2021-05-06 00:11:30,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:11:31,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:31,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:31,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:31,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:31,300 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:11:31,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:11:31,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727675956] [2021-05-06 00:11:31,300 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:11:31,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535066525] [2021-05-06 00:11:31,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535066525] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:11:31,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:11:31,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2021-05-06 00:11:31,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184932723] [2021-05-06 00:11:31,301 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-06 00:11:31,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:11:31,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-06 00:11:31,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=844, Unknown=0, NotChecked=0, Total=930 [2021-05-06 00:11:31,302 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand has 31 states, 31 states have (on average 1.096774193548387) internal successors, (34), 31 states have internal predecessors, (34), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:31,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:11:31,666 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2021-05-06 00:11:31,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-06 00:11:31,666 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.096774193548387) internal successors, (34), 31 states have internal predecessors, (34), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2021-05-06 00:11:31,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:11:31,667 INFO L225 Difference]: With dead ends: 42 [2021-05-06 00:11:31,667 INFO L226 Difference]: Without dead ends: 39 [2021-05-06 00:11:31,667 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 440.0ms TimeCoverageRelationStatistics Valid=91, Invalid=901, Unknown=0, NotChecked=0, Total=992 [2021-05-06 00:11:31,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-06 00:11:31,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-05-06 00:11:31,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 35 states have (on average 1.0285714285714285) internal successors, (36), 35 states have internal predecessors, (36), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:31,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2021-05-06 00:11:31,671 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2021-05-06 00:11:31,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:11:31,671 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2021-05-06 00:11:31,671 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.096774193548387) internal successors, (34), 31 states have internal predecessors, (34), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:31,671 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2021-05-06 00:11:31,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-06 00:11:31,672 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:11:31,672 INFO L523 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:11:31,887 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:11:31,888 INFO L428 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:11:31,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:11:31,888 INFO L82 PathProgramCache]: Analyzing trace with hash -885846591, now seen corresponding path program 22 times [2021-05-06 00:11:31,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:11:31,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583489928] [2021-05-06 00:11:31,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:11:31,896 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:11:31,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2060171138] [2021-05-06 00:11:31,896 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:11:31,945 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 00:11:31,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:11:31,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 116 conjunts are in the unsatisfiable core [2021-05-06 00:11:31,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:11:32,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:32,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:32,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:32,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:32,463 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:11:32,463 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:11:32,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583489928] [2021-05-06 00:11:32,463 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:11:32,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060171138] [2021-05-06 00:11:32,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060171138] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:11:32,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:11:32,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2021-05-06 00:11:32,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602928869] [2021-05-06 00:11:32,464 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-06 00:11:32,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:11:32,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-06 00:11:32,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2021-05-06 00:11:32,464 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand has 31 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 31 states have internal predecessors, (35), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:32,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:11:32,824 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2021-05-06 00:11:32,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-06 00:11:32,824 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 31 states have internal predecessors, (35), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2021-05-06 00:11:32,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:11:32,825 INFO L225 Difference]: With dead ends: 43 [2021-05-06 00:11:32,825 INFO L226 Difference]: Without dead ends: 40 [2021-05-06 00:11:32,825 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 426.7ms TimeCoverageRelationStatistics Valid=63, Invalid=929, Unknown=0, NotChecked=0, Total=992 [2021-05-06 00:11:32,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-06 00:11:32,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-05-06 00:11:32,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 36 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:32,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2021-05-06 00:11:32,827 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2021-05-06 00:11:32,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:11:32,828 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2021-05-06 00:11:32,828 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 31 states have internal predecessors, (35), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:32,828 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2021-05-06 00:11:32,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-06 00:11:32,828 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:11:32,828 INFO L523 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:11:33,040 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-05-06 00:11:33,041 INFO L428 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:11:33,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:11:33,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1691502998, now seen corresponding path program 23 times [2021-05-06 00:11:33,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:11:33,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569494059] [2021-05-06 00:11:33,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:11:33,049 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:11:33,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [368692159] [2021-05-06 00:11:33,049 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:11:33,108 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-05-06 00:11:33,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:11:33,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 120 conjunts are in the unsatisfiable core [2021-05-06 00:11:33,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:11:33,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:33,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:33,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:33,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:33,654 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:11:33,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:11:33,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569494059] [2021-05-06 00:11:33,655 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:11:33,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368692159] [2021-05-06 00:11:33,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368692159] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:11:33,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:11:33,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2021-05-06 00:11:33,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681853843] [2021-05-06 00:11:33,655 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-06 00:11:33,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:11:33,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-06 00:11:33,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2021-05-06 00:11:33,656 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand has 32 states, 32 states have (on average 1.125) internal successors, (36), 32 states have internal predecessors, (36), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:34,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:11:34,061 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2021-05-06 00:11:34,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-06 00:11:34,061 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.125) internal successors, (36), 32 states have internal predecessors, (36), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2021-05-06 00:11:34,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:11:34,061 INFO L225 Difference]: With dead ends: 44 [2021-05-06 00:11:34,062 INFO L226 Difference]: Without dead ends: 41 [2021-05-06 00:11:34,062 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 471.2ms TimeCoverageRelationStatistics Valid=65, Invalid=991, Unknown=0, NotChecked=0, Total=1056 [2021-05-06 00:11:34,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-06 00:11:34,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-05-06 00:11:34,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 37 states have (on average 1.027027027027027) internal successors, (38), 37 states have internal predecessors, (38), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:34,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2021-05-06 00:11:34,065 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2021-05-06 00:11:34,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:11:34,065 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2021-05-06 00:11:34,065 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.125) internal successors, (36), 32 states have internal predecessors, (36), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:34,065 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2021-05-06 00:11:34,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-06 00:11:34,066 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:11:34,066 INFO L523 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:11:34,266 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:11:34,266 INFO L428 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:11:34,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:11:34,267 INFO L82 PathProgramCache]: Analyzing trace with hash -897047839, now seen corresponding path program 24 times [2021-05-06 00:11:34,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:11:34,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049862744] [2021-05-06 00:11:34,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:11:34,272 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:11:34,272 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [51077532] [2021-05-06 00:11:34,272 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:11:34,335 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-05-06 00:11:34,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:11:34,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 124 conjunts are in the unsatisfiable core [2021-05-06 00:11:34,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:11:34,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:34,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:34,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:34,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:34,873 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:11:34,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:11:34,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049862744] [2021-05-06 00:11:34,873 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:11:34,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51077532] [2021-05-06 00:11:34,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51077532] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:11:34,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:11:34,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2021-05-06 00:11:34,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223074479] [2021-05-06 00:11:34,874 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-06 00:11:34,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:11:34,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-06 00:11:34,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2021-05-06 00:11:34,874 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand has 33 states, 33 states have (on average 1.121212121212121) internal successors, (37), 33 states have internal predecessors, (37), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:35,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:11:35,324 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2021-05-06 00:11:35,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-06 00:11:35,324 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.121212121212121) internal successors, (37), 33 states have internal predecessors, (37), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2021-05-06 00:11:35,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:11:35,324 INFO L225 Difference]: With dead ends: 45 [2021-05-06 00:11:35,324 INFO L226 Difference]: Without dead ends: 42 [2021-05-06 00:11:35,325 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 474.0ms TimeCoverageRelationStatistics Valid=67, Invalid=1055, Unknown=0, NotChecked=0, Total=1122 [2021-05-06 00:11:35,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-06 00:11:35,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-05-06 00:11:35,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 38 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:35,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2021-05-06 00:11:35,327 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2021-05-06 00:11:35,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:11:35,327 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2021-05-06 00:11:35,328 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.121212121212121) internal successors, (37), 33 states have internal predecessors, (37), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:35,328 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2021-05-06 00:11:35,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-06 00:11:35,328 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:11:35,328 INFO L523 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:11:35,540 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-05-06 00:11:35,541 INFO L428 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:11:35,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:11:35,541 INFO L82 PathProgramCache]: Analyzing trace with hash -2038741686, now seen corresponding path program 25 times [2021-05-06 00:11:35,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:11:35,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275448843] [2021-05-06 00:11:35,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:11:35,547 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:11:35,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2058857327] [2021-05-06 00:11:35,547 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:11:35,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 00:11:35,610 WARN L261 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 128 conjunts are in the unsatisfiable core [2021-05-06 00:11:35,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:11:36,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:36,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:36,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:36,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:36,156 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:11:36,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:11:36,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275448843] [2021-05-06 00:11:36,156 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:11:36,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058857327] [2021-05-06 00:11:36,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058857327] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:11:36,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:11:36,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2021-05-06 00:11:36,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749639445] [2021-05-06 00:11:36,157 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-06 00:11:36,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:11:36,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-06 00:11:36,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2021-05-06 00:11:36,157 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand has 34 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 34 states have internal predecessors, (38), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:36,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:11:36,657 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2021-05-06 00:11:36,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-06 00:11:36,657 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 34 states have internal predecessors, (38), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2021-05-06 00:11:36,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:11:36,658 INFO L225 Difference]: With dead ends: 46 [2021-05-06 00:11:36,658 INFO L226 Difference]: Without dead ends: 43 [2021-05-06 00:11:36,658 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 483.8ms TimeCoverageRelationStatistics Valid=69, Invalid=1121, Unknown=0, NotChecked=0, Total=1190 [2021-05-06 00:11:36,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-06 00:11:36,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-05-06 00:11:36,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 39 states have (on average 1.0256410256410255) internal successors, (40), 39 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:36,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2021-05-06 00:11:36,661 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2021-05-06 00:11:36,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:11:36,661 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2021-05-06 00:11:36,661 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 34 states have internal predecessors, (38), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:36,661 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2021-05-06 00:11:36,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-06 00:11:36,661 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:11:36,661 INFO L523 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:11:36,868 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:11:36,869 INFO L428 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:11:36,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:11:36,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1223454721, now seen corresponding path program 26 times [2021-05-06 00:11:36,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:11:36,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76520684] [2021-05-06 00:11:36,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:11:36,875 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:11:36,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2064314346] [2021-05-06 00:11:36,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:11:36,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 00:11:36,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:11:36,936 WARN L261 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 132 conjunts are in the unsatisfiable core [2021-05-06 00:11:36,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:11:37,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:37,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:37,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:37,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:37,576 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:11:37,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:11:37,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76520684] [2021-05-06 00:11:37,576 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:11:37,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064314346] [2021-05-06 00:11:37,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064314346] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:11:37,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:11:37,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2021-05-06 00:11:37,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844457064] [2021-05-06 00:11:37,577 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-06 00:11:37,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:11:37,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-06 00:11:37,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2021-05-06 00:11:37,582 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand has 35 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 35 states have internal predecessors, (39), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:38,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:11:38,073 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2021-05-06 00:11:38,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-06 00:11:38,074 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 35 states have internal predecessors, (39), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2021-05-06 00:11:38,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:11:38,074 INFO L225 Difference]: With dead ends: 47 [2021-05-06 00:11:38,074 INFO L226 Difference]: Without dead ends: 44 [2021-05-06 00:11:38,075 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 562.1ms TimeCoverageRelationStatistics Valid=71, Invalid=1189, Unknown=0, NotChecked=0, Total=1260 [2021-05-06 00:11:38,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-06 00:11:38,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-05-06 00:11:38,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 40 states have (on average 1.025) internal successors, (41), 40 states have internal predecessors, (41), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:38,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2021-05-06 00:11:38,078 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2021-05-06 00:11:38,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:11:38,078 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2021-05-06 00:11:38,078 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 35 states have internal predecessors, (39), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:38,078 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2021-05-06 00:11:38,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-06 00:11:38,078 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:11:38,078 INFO L523 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:11:38,278 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-05-06 00:11:38,279 INFO L428 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:11:38,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:11:38,279 INFO L82 PathProgramCache]: Analyzing trace with hash -727671766, now seen corresponding path program 27 times [2021-05-06 00:11:38,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:11:38,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505406035] [2021-05-06 00:11:38,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:11:38,284 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:11:38,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1299850933] [2021-05-06 00:11:38,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:11:38,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-05-06 00:11:38,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:11:38,357 WARN L261 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 137 conjunts are in the unsatisfiable core [2021-05-06 00:11:38,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:11:39,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:39,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:39,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:39,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:39,103 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:11:39,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:11:39,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505406035] [2021-05-06 00:11:39,103 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:11:39,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299850933] [2021-05-06 00:11:39,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299850933] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:11:39,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:11:39,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2021-05-06 00:11:39,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945629406] [2021-05-06 00:11:39,104 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-06 00:11:39,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:11:39,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-06 00:11:39,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1228, Unknown=0, NotChecked=0, Total=1332 [2021-05-06 00:11:39,104 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand has 37 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 37 states have internal predecessors, (40), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:39,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:11:39,649 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2021-05-06 00:11:39,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-06 00:11:39,649 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 37 states have internal predecessors, (40), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2021-05-06 00:11:39,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:11:39,649 INFO L225 Difference]: With dead ends: 48 [2021-05-06 00:11:39,649 INFO L226 Difference]: Without dead ends: 45 [2021-05-06 00:11:39,650 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 663.9ms TimeCoverageRelationStatistics Valid=109, Invalid=1297, Unknown=0, NotChecked=0, Total=1406 [2021-05-06 00:11:39,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-06 00:11:39,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-05-06 00:11:39,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 41 states have (on average 1.024390243902439) internal successors, (42), 41 states have internal predecessors, (42), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:39,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2021-05-06 00:11:39,652 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2021-05-06 00:11:39,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:11:39,652 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2021-05-06 00:11:39,652 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 37 states have internal predecessors, (40), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:39,652 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2021-05-06 00:11:39,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-06 00:11:39,652 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:11:39,653 INFO L523 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:11:39,865 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:11:39,865 INFO L428 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:11:39,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:11:39,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1083050719, now seen corresponding path program 28 times [2021-05-06 00:11:39,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:11:39,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204377772] [2021-05-06 00:11:39,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:11:39,872 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:11:39,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1312037993] [2021-05-06 00:11:39,872 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:11:39,934 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 00:11:39,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:11:39,944 WARN L261 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 140 conjunts are in the unsatisfiable core [2021-05-06 00:11:39,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:11:40,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:40,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:40,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:40,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:40,616 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:11:40,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:11:40,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204377772] [2021-05-06 00:11:40,616 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:11:40,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312037993] [2021-05-06 00:11:40,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312037993] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:11:40,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:11:40,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2021-05-06 00:11:40,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117278957] [2021-05-06 00:11:40,617 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-06 00:11:40,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:11:40,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-06 00:11:40,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2021-05-06 00:11:40,618 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand has 37 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 37 states have internal predecessors, (41), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:41,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:11:41,157 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2021-05-06 00:11:41,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-06 00:11:41,157 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 37 states have internal predecessors, (41), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2021-05-06 00:11:41,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:11:41,158 INFO L225 Difference]: With dead ends: 49 [2021-05-06 00:11:41,158 INFO L226 Difference]: Without dead ends: 46 [2021-05-06 00:11:41,158 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 603.6ms TimeCoverageRelationStatistics Valid=75, Invalid=1331, Unknown=0, NotChecked=0, Total=1406 [2021-05-06 00:11:41,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-06 00:11:41,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-05-06 00:11:41,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 42 states have internal predecessors, (43), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:41,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2021-05-06 00:11:41,161 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2021-05-06 00:11:41,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:11:41,161 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2021-05-06 00:11:41,161 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 37 states have internal predecessors, (41), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:41,161 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2021-05-06 00:11:41,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-06 00:11:41,161 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:11:41,161 INFO L523 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:11:41,377 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-05-06 00:11:41,377 INFO L428 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:11:41,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:11:41,377 INFO L82 PathProgramCache]: Analyzing trace with hash 785103626, now seen corresponding path program 29 times [2021-05-06 00:11:41,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:11:41,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519777124] [2021-05-06 00:11:41,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:11:41,382 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:11:41,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [233051458] [2021-05-06 00:11:41,383 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:11:41,447 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-05-06 00:11:41,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:11:41,450 WARN L261 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 144 conjunts are in the unsatisfiable core [2021-05-06 00:11:41,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:11:42,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:42,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:42,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:42,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:42,341 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:11:42,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:11:42,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519777124] [2021-05-06 00:11:42,342 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:11:42,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233051458] [2021-05-06 00:11:42,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233051458] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:11:42,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:11:42,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2021-05-06 00:11:42,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482766605] [2021-05-06 00:11:42,342 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-06 00:11:42,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:11:42,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-06 00:11:42,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2021-05-06 00:11:42,344 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand has 38 states, 38 states have (on average 1.105263157894737) internal successors, (42), 38 states have internal predecessors, (42), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:42,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:11:42,960 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2021-05-06 00:11:42,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-06 00:11:42,961 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.105263157894737) internal successors, (42), 38 states have internal predecessors, (42), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2021-05-06 00:11:42,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:11:42,961 INFO L225 Difference]: With dead ends: 50 [2021-05-06 00:11:42,961 INFO L226 Difference]: Without dead ends: 47 [2021-05-06 00:11:42,962 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 811.8ms TimeCoverageRelationStatistics Valid=77, Invalid=1405, Unknown=0, NotChecked=0, Total=1482 [2021-05-06 00:11:42,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-06 00:11:42,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-05-06 00:11:42,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 43 states have (on average 1.0232558139534884) internal successors, (44), 43 states have internal predecessors, (44), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:42,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2021-05-06 00:11:42,964 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2021-05-06 00:11:42,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:11:42,964 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2021-05-06 00:11:42,964 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.105263157894737) internal successors, (42), 38 states have internal predecessors, (42), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:42,964 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2021-05-06 00:11:42,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-06 00:11:42,965 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:11:42,965 INFO L523 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:11:43,180 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:11:43,180 INFO L428 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:11:43,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:11:43,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1431653823, now seen corresponding path program 30 times [2021-05-06 00:11:43,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:11:43,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075684886] [2021-05-06 00:11:43,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:11:43,185 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:11:43,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [63661827] [2021-05-06 00:11:43,186 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:11:43,266 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-05-06 00:11:43,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:11:43,268 WARN L261 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 148 conjunts are in the unsatisfiable core [2021-05-06 00:11:43,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:11:44,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:44,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:44,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:44,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:44,097 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:11:44,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:11:44,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075684886] [2021-05-06 00:11:44,097 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:11:44,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63661827] [2021-05-06 00:11:44,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63661827] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:11:44,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:11:44,097 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2021-05-06 00:11:44,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699311569] [2021-05-06 00:11:44,097 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-06 00:11:44,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:11:44,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-06 00:11:44,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2021-05-06 00:11:44,099 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand has 39 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 39 states have internal predecessors, (43), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:44,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:11:44,890 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2021-05-06 00:11:44,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-06 00:11:44,890 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 39 states have internal predecessors, (43), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2021-05-06 00:11:44,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:11:44,891 INFO L225 Difference]: With dead ends: 51 [2021-05-06 00:11:44,891 INFO L226 Difference]: Without dead ends: 48 [2021-05-06 00:11:44,891 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 749.5ms TimeCoverageRelationStatistics Valid=79, Invalid=1481, Unknown=0, NotChecked=0, Total=1560 [2021-05-06 00:11:44,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-06 00:11:44,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-05-06 00:11:44,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 44 states have (on average 1.0227272727272727) internal successors, (45), 44 states have internal predecessors, (45), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:44,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2021-05-06 00:11:44,894 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2021-05-06 00:11:44,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:11:44,894 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2021-05-06 00:11:44,894 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 39 states have internal predecessors, (43), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:44,894 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2021-05-06 00:11:44,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-06 00:11:44,894 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:11:44,894 INFO L523 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:11:45,104 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:11:45,105 INFO L428 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:11:45,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:11:45,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1431658006, now seen corresponding path program 31 times [2021-05-06 00:11:45,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:11:45,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404458140] [2021-05-06 00:11:45,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:11:45,110 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:11:45,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1086590649] [2021-05-06 00:11:45,110 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:11:45,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 00:11:45,172 WARN L261 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 152 conjunts are in the unsatisfiable core [2021-05-06 00:11:45,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:11:46,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:46,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:46,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:46,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:46,070 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:11:46,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:11:46,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404458140] [2021-05-06 00:11:46,071 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:11:46,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086590649] [2021-05-06 00:11:46,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086590649] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:11:46,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:11:46,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2021-05-06 00:11:46,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680767589] [2021-05-06 00:11:46,071 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-06 00:11:46,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:11:46,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-06 00:11:46,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2021-05-06 00:11:46,072 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand has 40 states, 40 states have (on average 1.1) internal successors, (44), 40 states have internal predecessors, (44), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:46,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:11:46,755 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2021-05-06 00:11:46,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-06 00:11:46,755 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.1) internal successors, (44), 40 states have internal predecessors, (44), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2021-05-06 00:11:46,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:11:46,756 INFO L225 Difference]: With dead ends: 52 [2021-05-06 00:11:46,756 INFO L226 Difference]: Without dead ends: 49 [2021-05-06 00:11:46,756 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 803.2ms TimeCoverageRelationStatistics Valid=81, Invalid=1559, Unknown=0, NotChecked=0, Total=1640 [2021-05-06 00:11:46,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-06 00:11:46,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-05-06 00:11:46,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 45 states have (on average 1.0222222222222221) internal successors, (46), 45 states have internal predecessors, (46), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:46,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2021-05-06 00:11:46,759 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2021-05-06 00:11:46,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:11:46,759 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2021-05-06 00:11:46,759 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.1) internal successors, (44), 40 states have internal predecessors, (44), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:46,759 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2021-05-06 00:11:46,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-06 00:11:46,759 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:11:46,759 INFO L523 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:11:46,972 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2021-05-06 00:11:46,973 INFO L428 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:11:46,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:11:46,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1431787679, now seen corresponding path program 32 times [2021-05-06 00:11:46,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:11:46,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664654441] [2021-05-06 00:11:46,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:11:46,978 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:11:46,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [701424738] [2021-05-06 00:11:46,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:11:47,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 00:11:47,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:11:47,078 WARN L261 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 156 conjunts are in the unsatisfiable core [2021-05-06 00:11:47,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:11:47,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:47,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:47,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:47,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:48,027 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:11:48,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:11:48,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664654441] [2021-05-06 00:11:48,028 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:11:48,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701424738] [2021-05-06 00:11:48,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701424738] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:11:48,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:11:48,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2021-05-06 00:11:48,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999857164] [2021-05-06 00:11:48,028 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-05-06 00:11:48,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:11:48,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-05-06 00:11:48,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2021-05-06 00:11:48,029 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand has 41 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 41 states have internal predecessors, (45), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:48,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:11:48,919 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2021-05-06 00:11:48,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-06 00:11:48,919 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 41 states have internal predecessors, (45), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2021-05-06 00:11:48,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:11:48,919 INFO L225 Difference]: With dead ends: 53 [2021-05-06 00:11:48,919 INFO L226 Difference]: Without dead ends: 50 [2021-05-06 00:11:48,920 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 840.2ms TimeCoverageRelationStatistics Valid=83, Invalid=1639, Unknown=0, NotChecked=0, Total=1722 [2021-05-06 00:11:48,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-06 00:11:48,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-05-06 00:11:48,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 46 states have (on average 1.0217391304347827) internal successors, (47), 46 states have internal predecessors, (47), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:48,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2021-05-06 00:11:48,922 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2021-05-06 00:11:48,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:11:48,922 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2021-05-06 00:11:48,922 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 41 states have internal predecessors, (45), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:48,922 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2021-05-06 00:11:48,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-06 00:11:48,923 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:11:48,923 INFO L523 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:11:49,133 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:11:49,134 INFO L428 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:11:49,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:11:49,134 INFO L82 PathProgramCache]: Analyzing trace with hash -1435807542, now seen corresponding path program 33 times [2021-05-06 00:11:49,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:11:49,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305552292] [2021-05-06 00:11:49,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:11:49,139 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:11:49,140 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1695312441] [2021-05-06 00:11:49,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:11:49,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-05-06 00:11:49,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:11:49,217 WARN L261 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 160 conjunts are in the unsatisfiable core [2021-05-06 00:11:49,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:11:49,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:49,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:49,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:49,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:50,009 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:11:50,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:11:50,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305552292] [2021-05-06 00:11:50,009 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:11:50,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695312441] [2021-05-06 00:11:50,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695312441] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:11:50,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:11:50,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2021-05-06 00:11:50,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104196966] [2021-05-06 00:11:50,009 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-05-06 00:11:50,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:11:50,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-05-06 00:11:50,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2021-05-06 00:11:50,010 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand has 42 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 42 states have internal predecessors, (46), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:50,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:11:50,759 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2021-05-06 00:11:50,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-06 00:11:50,759 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 42 states have internal predecessors, (46), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2021-05-06 00:11:50,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:11:50,759 INFO L225 Difference]: With dead ends: 54 [2021-05-06 00:11:50,759 INFO L226 Difference]: Without dead ends: 51 [2021-05-06 00:11:50,760 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 734.2ms TimeCoverageRelationStatistics Valid=85, Invalid=1721, Unknown=0, NotChecked=0, Total=1806 [2021-05-06 00:11:50,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-06 00:11:50,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-05-06 00:11:50,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 47 states have (on average 1.0212765957446808) internal successors, (48), 47 states have internal predecessors, (48), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:50,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2021-05-06 00:11:50,763 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2021-05-06 00:11:50,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:11:50,763 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2021-05-06 00:11:50,763 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 42 states have internal predecessors, (46), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:50,763 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2021-05-06 00:11:50,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-06 00:11:50,763 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:11:50,763 INFO L523 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:11:50,974 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-05-06 00:11:50,974 INFO L428 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:11:50,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:11:50,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1560423295, now seen corresponding path program 34 times [2021-05-06 00:11:50,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:11:50,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723889783] [2021-05-06 00:11:50,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:11:50,980 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:11:50,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1503094713] [2021-05-06 00:11:50,980 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:11:51,042 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 00:11:51,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:11:51,044 WARN L261 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 164 conjunts are in the unsatisfiable core [2021-05-06 00:11:51,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:11:51,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:51,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:51,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:51,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:51,877 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:11:51,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:11:51,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723889783] [2021-05-06 00:11:51,878 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:11:51,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503094713] [2021-05-06 00:11:51,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503094713] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:11:51,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:11:51,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2021-05-06 00:11:51,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037262612] [2021-05-06 00:11:51,878 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-05-06 00:11:51,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:11:51,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-05-06 00:11:51,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2021-05-06 00:11:51,879 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand has 43 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 43 states have internal predecessors, (47), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:52,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:11:52,658 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2021-05-06 00:11:52,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-06 00:11:52,663 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 43 states have internal predecessors, (47), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2021-05-06 00:11:52,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:11:52,664 INFO L225 Difference]: With dead ends: 55 [2021-05-06 00:11:52,664 INFO L226 Difference]: Without dead ends: 52 [2021-05-06 00:11:52,664 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 778.1ms TimeCoverageRelationStatistics Valid=87, Invalid=1805, Unknown=0, NotChecked=0, Total=1892 [2021-05-06 00:11:52,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-06 00:11:52,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-05-06 00:11:52,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 48 states have (on average 1.0208333333333333) internal successors, (49), 48 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:52,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2021-05-06 00:11:52,667 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2021-05-06 00:11:52,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:11:52,667 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2021-05-06 00:11:52,667 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 43 states have internal predecessors, (47), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:52,667 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2021-05-06 00:11:52,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-06 00:11:52,667 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:11:52,668 INFO L523 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:11:52,868 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-05-06 00:11:52,868 INFO L428 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:11:52,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:11:52,868 INFO L82 PathProgramCache]: Analyzing trace with hash -1128544342, now seen corresponding path program 35 times [2021-05-06 00:11:52,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:11:52,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131119334] [2021-05-06 00:11:52,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:11:52,875 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:11:52,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1953641925] [2021-05-06 00:11:52,875 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:11:52,946 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2021-05-06 00:11:52,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:11:52,949 WARN L261 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 168 conjunts are in the unsatisfiable core [2021-05-06 00:11:52,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:11:53,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:53,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:53,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:53,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:53,812 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:11:53,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:11:53,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131119334] [2021-05-06 00:11:53,813 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:11:53,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953641925] [2021-05-06 00:11:53,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953641925] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:11:53,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:11:53,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2021-05-06 00:11:53,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951214693] [2021-05-06 00:11:53,813 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-05-06 00:11:53,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:11:53,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-05-06 00:11:53,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2021-05-06 00:11:53,814 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand has 44 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 44 states have internal predecessors, (48), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:54,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:11:54,627 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2021-05-06 00:11:54,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-06 00:11:54,627 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 44 states have internal predecessors, (48), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2021-05-06 00:11:54,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:11:54,628 INFO L225 Difference]: With dead ends: 56 [2021-05-06 00:11:54,628 INFO L226 Difference]: Without dead ends: 53 [2021-05-06 00:11:54,629 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 808.9ms TimeCoverageRelationStatistics Valid=89, Invalid=1891, Unknown=0, NotChecked=0, Total=1980 [2021-05-06 00:11:54,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-05-06 00:11:54,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-05-06 00:11:54,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 49 states have (on average 1.0204081632653061) internal successors, (50), 49 states have internal predecessors, (50), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:54,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2021-05-06 00:11:54,631 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2021-05-06 00:11:54,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:11:54,631 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2021-05-06 00:11:54,631 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 44 states have internal predecessors, (48), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:54,631 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2021-05-06 00:11:54,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-06 00:11:54,632 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:11:54,632 INFO L523 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:11:54,832 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-05-06 00:11:54,832 INFO L428 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:11:54,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:11:54,833 INFO L82 PathProgramCache]: Analyzing trace with hash -625198687, now seen corresponding path program 36 times [2021-05-06 00:11:54,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:11:54,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005935916] [2021-05-06 00:11:54,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:11:54,838 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:11:54,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1657241815] [2021-05-06 00:11:54,838 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:11:54,915 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-05-06 00:11:54,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:11:54,917 WARN L261 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 173 conjunts are in the unsatisfiable core [2021-05-06 00:11:54,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:11:55,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:55,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:55,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:55,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:55,943 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:11:55,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:11:55,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005935916] [2021-05-06 00:11:55,943 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:11:55,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657241815] [2021-05-06 00:11:55,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657241815] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:11:55,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:11:55,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2021-05-06 00:11:55,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915570355] [2021-05-06 00:11:55,944 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-05-06 00:11:55,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:11:55,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-05-06 00:11:55,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1939, Unknown=0, NotChecked=0, Total=2070 [2021-05-06 00:11:55,945 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand has 46 states, 46 states have (on average 1.065217391304348) internal successors, (49), 46 states have internal predecessors, (49), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:56,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:11:56,847 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2021-05-06 00:11:56,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-06 00:11:56,847 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.065217391304348) internal successors, (49), 46 states have internal predecessors, (49), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2021-05-06 00:11:56,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:11:56,847 INFO L225 Difference]: With dead ends: 57 [2021-05-06 00:11:56,847 INFO L226 Difference]: Without dead ends: 54 [2021-05-06 00:11:56,848 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 938.3ms TimeCoverageRelationStatistics Valid=136, Invalid=2026, Unknown=0, NotChecked=0, Total=2162 [2021-05-06 00:11:56,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-06 00:11:56,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-05-06 00:11:56,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 50 states have (on average 1.02) internal successors, (51), 50 states have internal predecessors, (51), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:56,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2021-05-06 00:11:56,851 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2021-05-06 00:11:56,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:11:56,851 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2021-05-06 00:11:56,851 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 1.065217391304348) internal successors, (49), 46 states have internal predecessors, (49), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:56,851 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2021-05-06 00:11:56,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-05-06 00:11:56,851 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:11:56,851 INFO L523 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:11:57,067 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2021-05-06 00:11:57,068 INFO L428 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:11:57,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:11:57,068 INFO L82 PathProgramCache]: Analyzing trace with hash 2093614730, now seen corresponding path program 37 times [2021-05-06 00:11:57,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:11:57,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419934221] [2021-05-06 00:11:57,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:11:57,073 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:11:57,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2058922948] [2021-05-06 00:11:57,074 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:11:57,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 00:11:57,141 WARN L261 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 176 conjunts are in the unsatisfiable core [2021-05-06 00:11:57,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:11:58,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:58,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:58,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:58,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:11:58,080 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:11:58,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:11:58,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419934221] [2021-05-06 00:11:58,080 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:11:58,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058922948] [2021-05-06 00:11:58,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058922948] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:11:58,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:11:58,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2021-05-06 00:11:58,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850713219] [2021-05-06 00:11:58,081 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-05-06 00:11:58,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:11:58,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-05-06 00:11:58,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2021-05-06 00:11:58,082 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand has 46 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 46 states have internal predecessors, (50), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:59,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:11:59,000 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2021-05-06 00:11:59,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-06 00:11:59,001 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 46 states have internal predecessors, (50), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2021-05-06 00:11:59,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:11:59,001 INFO L225 Difference]: With dead ends: 58 [2021-05-06 00:11:59,001 INFO L226 Difference]: Without dead ends: 55 [2021-05-06 00:11:59,001 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 875.9ms TimeCoverageRelationStatistics Valid=93, Invalid=2069, Unknown=0, NotChecked=0, Total=2162 [2021-05-06 00:11:59,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-06 00:11:59,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-05-06 00:11:59,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 51 states have (on average 1.0196078431372548) internal successors, (52), 51 states have internal predecessors, (52), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:59,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2021-05-06 00:11:59,004 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2021-05-06 00:11:59,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:11:59,004 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2021-05-06 00:11:59,004 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 46 states have internal predecessors, (50), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:11:59,004 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2021-05-06 00:11:59,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-06 00:11:59,004 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:11:59,005 INFO L523 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:11:59,205 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-05-06 00:11:59,205 INFO L428 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:11:59,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:11:59,205 INFO L82 PathProgramCache]: Analyzing trace with hash 477484737, now seen corresponding path program 38 times [2021-05-06 00:11:59,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:11:59,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400458293] [2021-05-06 00:11:59,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:11:59,211 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:11:59,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1626363284] [2021-05-06 00:11:59,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:11:59,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 00:11:59,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:11:59,292 WARN L261 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 180 conjunts are in the unsatisfiable core [2021-05-06 00:11:59,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:12:00,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:00,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:00,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:00,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:00,283 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:12:00,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:12:00,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400458293] [2021-05-06 00:12:00,284 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:12:00,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626363284] [2021-05-06 00:12:00,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626363284] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:12:00,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:12:00,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2021-05-06 00:12:00,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059562745] [2021-05-06 00:12:00,284 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-05-06 00:12:00,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:12:00,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-05-06 00:12:00,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2021-05-06 00:12:00,285 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand has 47 states, 47 states have (on average 1.0851063829787233) internal successors, (51), 47 states have internal predecessors, (51), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:01,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:12:01,291 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2021-05-06 00:12:01,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-06 00:12:01,291 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.0851063829787233) internal successors, (51), 47 states have internal predecessors, (51), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2021-05-06 00:12:01,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:12:01,291 INFO L225 Difference]: With dead ends: 59 [2021-05-06 00:12:01,291 INFO L226 Difference]: Without dead ends: 56 [2021-05-06 00:12:01,292 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 932.2ms TimeCoverageRelationStatistics Valid=95, Invalid=2161, Unknown=0, NotChecked=0, Total=2256 [2021-05-06 00:12:01,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-06 00:12:01,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-05-06 00:12:01,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 52 states have (on average 1.0192307692307692) internal successors, (53), 52 states have internal predecessors, (53), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:01,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2021-05-06 00:12:01,294 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2021-05-06 00:12:01,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:12:01,294 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2021-05-06 00:12:01,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.0851063829787233) internal successors, (51), 47 states have internal predecessors, (51), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:01,295 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2021-05-06 00:12:01,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-06 00:12:01,295 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:12:01,295 INFO L523 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:12:01,496 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-05-06 00:12:01,497 INFO L428 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:12:01,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:12:01,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1917062506, now seen corresponding path program 39 times [2021-05-06 00:12:01,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:12:01,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377652356] [2021-05-06 00:12:01,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:12:01,503 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:12:01,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [118579444] [2021-05-06 00:12:01,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:12:01,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2021-05-06 00:12:01,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:12:01,592 WARN L261 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 184 conjunts are in the unsatisfiable core [2021-05-06 00:12:01,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:12:02,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:02,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:02,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:02,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:02,605 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:12:02,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:12:02,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377652356] [2021-05-06 00:12:02,605 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:12:02,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118579444] [2021-05-06 00:12:02,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118579444] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:12:02,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:12:02,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2021-05-06 00:12:02,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343434524] [2021-05-06 00:12:02,606 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-05-06 00:12:02,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:12:02,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-05-06 00:12:02,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=2163, Unknown=0, NotChecked=0, Total=2256 [2021-05-06 00:12:02,606 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand has 48 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 48 states have internal predecessors, (52), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:03,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:12:03,690 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2021-05-06 00:12:03,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-06 00:12:03,691 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 48 states have internal predecessors, (52), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2021-05-06 00:12:03,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:12:03,691 INFO L225 Difference]: With dead ends: 60 [2021-05-06 00:12:03,691 INFO L226 Difference]: Without dead ends: 57 [2021-05-06 00:12:03,692 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 952.4ms TimeCoverageRelationStatistics Valid=97, Invalid=2255, Unknown=0, NotChecked=0, Total=2352 [2021-05-06 00:12:03,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-05-06 00:12:03,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-05-06 00:12:03,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 53 states have (on average 1.0188679245283019) internal successors, (54), 53 states have internal predecessors, (54), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:03,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2021-05-06 00:12:03,695 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2021-05-06 00:12:03,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:12:03,695 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2021-05-06 00:12:03,695 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 48 states have internal predecessors, (52), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:03,695 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2021-05-06 00:12:03,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-06 00:12:03,696 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:12:03,696 INFO L523 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:12:03,908 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:12:03,908 INFO L428 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:12:03,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:12:03,908 INFO L82 PathProgramCache]: Analyzing trace with hash -700666911, now seen corresponding path program 40 times [2021-05-06 00:12:03,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:12:03,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522112686] [2021-05-06 00:12:03,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:12:03,918 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:12:03,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [749299434] [2021-05-06 00:12:03,919 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:12:03,986 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 00:12:03,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:12:03,989 WARN L261 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 188 conjunts are in the unsatisfiable core [2021-05-06 00:12:03,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:12:05,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:05,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:05,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:05,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:05,134 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:12:05,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:12:05,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522112686] [2021-05-06 00:12:05,134 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:12:05,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749299434] [2021-05-06 00:12:05,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749299434] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:12:05,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:12:05,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2021-05-06 00:12:05,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308755770] [2021-05-06 00:12:05,134 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-05-06 00:12:05,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:12:05,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-05-06 00:12:05,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2021-05-06 00:12:05,135 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand has 49 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 49 states have internal predecessors, (53), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:06,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:12:06,320 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2021-05-06 00:12:06,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-06 00:12:06,320 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 49 states have internal predecessors, (53), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2021-05-06 00:12:06,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:12:06,321 INFO L225 Difference]: With dead ends: 61 [2021-05-06 00:12:06,321 INFO L226 Difference]: Without dead ends: 58 [2021-05-06 00:12:06,321 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1083.2ms TimeCoverageRelationStatistics Valid=99, Invalid=2351, Unknown=0, NotChecked=0, Total=2450 [2021-05-06 00:12:06,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-06 00:12:06,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-05-06 00:12:06,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 54 states have (on average 1.0185185185185186) internal successors, (55), 54 states have internal predecessors, (55), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:06,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2021-05-06 00:12:06,324 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2021-05-06 00:12:06,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:12:06,324 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2021-05-06 00:12:06,324 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 49 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 49 states have internal predecessors, (53), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:06,324 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2021-05-06 00:12:06,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-06 00:12:06,324 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:12:06,324 INFO L523 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:12:06,540 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:12:06,541 INFO L428 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:12:06,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:12:06,541 INFO L82 PathProgramCache]: Analyzing trace with hash -245900214, now seen corresponding path program 41 times [2021-05-06 00:12:06,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:12:06,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231997276] [2021-05-06 00:12:06,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:12:06,547 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:12:06,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [762481208] [2021-05-06 00:12:06,547 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:12:06,627 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2021-05-06 00:12:06,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:12:06,631 WARN L261 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 192 conjunts are in the unsatisfiable core [2021-05-06 00:12:06,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:12:07,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:07,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:07,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:07,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:07,727 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:12:07,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:12:07,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231997276] [2021-05-06 00:12:07,727 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:12:07,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762481208] [2021-05-06 00:12:07,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762481208] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:12:07,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:12:07,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2021-05-06 00:12:07,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331448802] [2021-05-06 00:12:07,728 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-05-06 00:12:07,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:12:07,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-05-06 00:12:07,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=2353, Unknown=0, NotChecked=0, Total=2450 [2021-05-06 00:12:07,728 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand has 50 states, 50 states have (on average 1.08) internal successors, (54), 50 states have internal predecessors, (54), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:08,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:12:08,900 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2021-05-06 00:12:08,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-06 00:12:08,901 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.08) internal successors, (54), 50 states have internal predecessors, (54), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2021-05-06 00:12:08,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:12:08,901 INFO L225 Difference]: With dead ends: 62 [2021-05-06 00:12:08,901 INFO L226 Difference]: Without dead ends: 59 [2021-05-06 00:12:08,901 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1035.5ms TimeCoverageRelationStatistics Valid=101, Invalid=2449, Unknown=0, NotChecked=0, Total=2550 [2021-05-06 00:12:08,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-05-06 00:12:08,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-05-06 00:12:08,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 55 states have (on average 1.018181818181818) internal successors, (56), 55 states have internal predecessors, (56), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:08,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2021-05-06 00:12:08,904 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2021-05-06 00:12:08,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:12:08,904 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2021-05-06 00:12:08,905 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 1.08) internal successors, (54), 50 states have internal predecessors, (54), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:08,905 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2021-05-06 00:12:08,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-06 00:12:08,905 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:12:08,905 INFO L523 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:12:09,105 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-05-06 00:12:09,105 INFO L428 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:12:09,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:12:09,106 INFO L82 PathProgramCache]: Analyzing trace with hash 966965505, now seen corresponding path program 42 times [2021-05-06 00:12:09,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:12:09,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336711653] [2021-05-06 00:12:09,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:12:09,112 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:12:09,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [590299138] [2021-05-06 00:12:09,112 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:12:09,190 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2021-05-06 00:12:09,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:12:09,193 WARN L261 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 197 conjunts are in the unsatisfiable core [2021-05-06 00:12:09,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:12:10,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:10,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:10,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:10,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:10,452 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:12:10,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:12:10,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336711653] [2021-05-06 00:12:10,452 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:12:10,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590299138] [2021-05-06 00:12:10,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590299138] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:12:10,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:12:10,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2021-05-06 00:12:10,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859865157] [2021-05-06 00:12:10,453 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-05-06 00:12:10,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:12:10,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-05-06 00:12:10,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=2503, Unknown=0, NotChecked=0, Total=2652 [2021-05-06 00:12:10,453 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand has 52 states, 52 states have (on average 1.0576923076923077) internal successors, (55), 52 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:11,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:12:11,796 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2021-05-06 00:12:11,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-06 00:12:11,796 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.0576923076923077) internal successors, (55), 52 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2021-05-06 00:12:11,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:12:11,797 INFO L225 Difference]: With dead ends: 63 [2021-05-06 00:12:11,797 INFO L226 Difference]: Without dead ends: 60 [2021-05-06 00:12:11,797 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1175.5ms TimeCoverageRelationStatistics Valid=154, Invalid=2602, Unknown=0, NotChecked=0, Total=2756 [2021-05-06 00:12:11,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-06 00:12:11,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-05-06 00:12:11,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 56 states have (on average 1.0178571428571428) internal successors, (57), 56 states have internal predecessors, (57), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:11,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2021-05-06 00:12:11,800 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2021-05-06 00:12:11,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:12:11,800 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2021-05-06 00:12:11,800 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 52 states, 52 states have (on average 1.0576923076923077) internal successors, (55), 52 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:11,800 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2021-05-06 00:12:11,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-05-06 00:12:11,800 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:12:11,800 INFO L523 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:12:12,017 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:12:12,017 INFO L428 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:12:12,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:12:12,017 INFO L82 PathProgramCache]: Analyzing trace with hash -88902870, now seen corresponding path program 43 times [2021-05-06 00:12:12,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:12:12,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403360402] [2021-05-06 00:12:12,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:12:12,023 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:12:12,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1490440079] [2021-05-06 00:12:12,023 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:12:12,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 00:12:12,099 WARN L261 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 200 conjunts are in the unsatisfiable core [2021-05-06 00:12:12,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:12:13,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:13,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:13,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:13,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:13,254 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:12:13,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:12:13,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403360402] [2021-05-06 00:12:13,254 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:12:13,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490440079] [2021-05-06 00:12:13,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490440079] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:12:13,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:12:13,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2021-05-06 00:12:13,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567017307] [2021-05-06 00:12:13,254 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-05-06 00:12:13,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:12:13,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-05-06 00:12:13,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=2551, Unknown=0, NotChecked=0, Total=2652 [2021-05-06 00:12:13,255 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand has 52 states, 52 states have (on average 1.0769230769230769) internal successors, (56), 52 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:14,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:12:14,611 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2021-05-06 00:12:14,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-06 00:12:14,612 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.0769230769230769) internal successors, (56), 52 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2021-05-06 00:12:14,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:12:14,612 INFO L225 Difference]: With dead ends: 64 [2021-05-06 00:12:14,612 INFO L226 Difference]: Without dead ends: 61 [2021-05-06 00:12:14,613 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1090.4ms TimeCoverageRelationStatistics Valid=105, Invalid=2651, Unknown=0, NotChecked=0, Total=2756 [2021-05-06 00:12:14,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-05-06 00:12:14,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2021-05-06 00:12:14,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 57 states have (on average 1.0175438596491229) internal successors, (58), 57 states have internal predecessors, (58), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:14,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2021-05-06 00:12:14,615 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2021-05-06 00:12:14,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:12:14,616 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2021-05-06 00:12:14,616 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 52 states, 52 states have (on average 1.0769230769230769) internal successors, (56), 52 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:14,616 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2021-05-06 00:12:14,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-05-06 00:12:14,616 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:12:14,616 INFO L523 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:12:14,828 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-05-06 00:12:14,829 INFO L428 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:12:14,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:12:14,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1538915873, now seen corresponding path program 44 times [2021-05-06 00:12:14,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:12:14,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786357271] [2021-05-06 00:12:14,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:12:14,835 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:12:14,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [936813968] [2021-05-06 00:12:14,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:12:14,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 00:12:14,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:12:14,916 WARN L261 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 204 conjunts are in the unsatisfiable core [2021-05-06 00:12:14,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:12:16,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:16,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:16,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:16,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:16,150 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:12:16,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:12:16,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786357271] [2021-05-06 00:12:16,150 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:12:16,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936813968] [2021-05-06 00:12:16,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936813968] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:12:16,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:12:16,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2021-05-06 00:12:16,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578111658] [2021-05-06 00:12:16,151 INFO L460 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-05-06 00:12:16,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:12:16,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-05-06 00:12:16,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2021-05-06 00:12:16,151 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand has 53 states, 53 states have (on average 1.0754716981132075) internal successors, (57), 53 states have internal predecessors, (57), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:17,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:12:17,528 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2021-05-06 00:12:17,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-05-06 00:12:17,528 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.0754716981132075) internal successors, (57), 53 states have internal predecessors, (57), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2021-05-06 00:12:17,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:12:17,528 INFO L225 Difference]: With dead ends: 65 [2021-05-06 00:12:17,528 INFO L226 Difference]: Without dead ends: 62 [2021-05-06 00:12:17,529 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1148.7ms TimeCoverageRelationStatistics Valid=107, Invalid=2755, Unknown=0, NotChecked=0, Total=2862 [2021-05-06 00:12:17,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-05-06 00:12:17,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-05-06 00:12:17,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 58 states have (on average 1.0172413793103448) internal successors, (59), 58 states have internal predecessors, (59), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:17,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2021-05-06 00:12:17,532 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2021-05-06 00:12:17,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:12:17,532 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2021-05-06 00:12:17,532 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 53 states, 53 states have (on average 1.0754716981132075) internal successors, (57), 53 states have internal predecessors, (57), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:17,532 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2021-05-06 00:12:17,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-06 00:12:17,532 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:12:17,532 INFO L523 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:12:17,737 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:12:17,738 INFO L428 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:12:17,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:12:17,738 INFO L82 PathProgramCache]: Analyzing trace with hash 461689354, now seen corresponding path program 45 times [2021-05-06 00:12:17,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:12:17,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568488532] [2021-05-06 00:12:17,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:12:17,744 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:12:17,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [647073139] [2021-05-06 00:12:17,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:12:17,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2021-05-06 00:12:17,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:12:17,834 WARN L261 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 208 conjunts are in the unsatisfiable core [2021-05-06 00:12:17,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:12:19,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:19,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:19,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:19,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:19,118 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:12:19,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:12:19,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568488532] [2021-05-06 00:12:19,118 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:12:19,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647073139] [2021-05-06 00:12:19,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647073139] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:12:19,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:12:19,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2021-05-06 00:12:19,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281927588] [2021-05-06 00:12:19,119 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-05-06 00:12:19,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:12:19,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-05-06 00:12:19,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=2757, Unknown=0, NotChecked=0, Total=2862 [2021-05-06 00:12:19,119 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:20,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:12:20,644 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2021-05-06 00:12:20,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-06 00:12:20,644 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2021-05-06 00:12:20,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:12:20,644 INFO L225 Difference]: With dead ends: 66 [2021-05-06 00:12:20,644 INFO L226 Difference]: Without dead ends: 63 [2021-05-06 00:12:20,645 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1231.0ms TimeCoverageRelationStatistics Valid=109, Invalid=2861, Unknown=0, NotChecked=0, Total=2970 [2021-05-06 00:12:20,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-05-06 00:12:20,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-05-06 00:12:20,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 59 states have (on average 1.0169491525423728) internal successors, (60), 59 states have internal predecessors, (60), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:20,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2021-05-06 00:12:20,648 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2021-05-06 00:12:20,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:12:20,648 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2021-05-06 00:12:20,648 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:20,648 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2021-05-06 00:12:20,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-05-06 00:12:20,648 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:12:20,648 INFO L523 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:12:20,858 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-05-06 00:12:20,859 INFO L428 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:12:20,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:12:20,859 INFO L82 PathProgramCache]: Analyzing trace with hash 1427405633, now seen corresponding path program 46 times [2021-05-06 00:12:20,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:12:20,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186832067] [2021-05-06 00:12:20,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:12:20,865 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:12:20,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [573380490] [2021-05-06 00:12:20,866 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:12:20,948 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 00:12:20,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:12:20,951 WARN L261 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 212 conjunts are in the unsatisfiable core [2021-05-06 00:12:20,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:12:22,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:22,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:22,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:22,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:22,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:12:22,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:12:22,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186832067] [2021-05-06 00:12:22,323 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:12:22,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573380490] [2021-05-06 00:12:22,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573380490] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:12:22,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:12:22,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2021-05-06 00:12:22,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273144594] [2021-05-06 00:12:22,324 INFO L460 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-05-06 00:12:22,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:12:22,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-05-06 00:12:22,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2021-05-06 00:12:22,324 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand has 55 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 55 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:23,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:12:23,935 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2021-05-06 00:12:23,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-05-06 00:12:23,935 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 55 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2021-05-06 00:12:23,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:12:23,935 INFO L225 Difference]: With dead ends: 67 [2021-05-06 00:12:23,935 INFO L226 Difference]: Without dead ends: 64 [2021-05-06 00:12:23,936 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1275.6ms TimeCoverageRelationStatistics Valid=111, Invalid=2969, Unknown=0, NotChecked=0, Total=3080 [2021-05-06 00:12:23,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-06 00:12:23,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-05-06 00:12:23,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 60 states have (on average 1.0166666666666666) internal successors, (61), 60 states have internal predecessors, (61), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:23,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2021-05-06 00:12:23,945 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2021-05-06 00:12:23,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:12:23,945 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2021-05-06 00:12:23,945 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 55 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 55 states have internal predecessors, (59), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:23,945 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2021-05-06 00:12:23,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-05-06 00:12:23,945 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:12:23,945 INFO L523 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:12:24,161 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:12:24,161 INFO L428 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:12:24,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:12:24,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1299839210, now seen corresponding path program 47 times [2021-05-06 00:12:24,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:12:24,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595767831] [2021-05-06 00:12:24,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:12:24,167 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:12:24,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1020032391] [2021-05-06 00:12:24,168 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:12:24,264 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2021-05-06 00:12:24,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:12:24,269 WARN L261 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 216 conjunts are in the unsatisfiable core [2021-05-06 00:12:24,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:12:25,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:25,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:25,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:25,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:25,649 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:12:25,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:12:25,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595767831] [2021-05-06 00:12:25,650 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:12:25,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020032391] [2021-05-06 00:12:25,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020032391] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:12:25,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:12:25,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2021-05-06 00:12:25,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289466263] [2021-05-06 00:12:25,650 INFO L460 AbstractCegarLoop]: Interpolant automaton has 56 states [2021-05-06 00:12:25,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:12:25,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-05-06 00:12:25,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=2971, Unknown=0, NotChecked=0, Total=3080 [2021-05-06 00:12:25,651 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand has 56 states, 56 states have (on average 1.0714285714285714) internal successors, (60), 56 states have internal predecessors, (60), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:27,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:12:27,409 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2021-05-06 00:12:27,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-06 00:12:27,410 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.0714285714285714) internal successors, (60), 56 states have internal predecessors, (60), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2021-05-06 00:12:27,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:12:27,411 INFO L225 Difference]: With dead ends: 68 [2021-05-06 00:12:27,411 INFO L226 Difference]: Without dead ends: 65 [2021-05-06 00:12:27,411 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1312.1ms TimeCoverageRelationStatistics Valid=113, Invalid=3079, Unknown=0, NotChecked=0, Total=3192 [2021-05-06 00:12:27,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-05-06 00:12:27,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-05-06 00:12:27,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 61 states have (on average 1.0163934426229508) internal successors, (62), 61 states have internal predecessors, (62), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:27,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2021-05-06 00:12:27,414 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2021-05-06 00:12:27,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:12:27,414 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2021-05-06 00:12:27,414 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 56 states, 56 states have (on average 1.0714285714285714) internal successors, (60), 56 states have internal predecessors, (60), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:27,414 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2021-05-06 00:12:27,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-06 00:12:27,415 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:12:27,415 INFO L523 BasicCegarLoop]: trace histogram [48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:12:27,637 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:12:27,637 INFO L428 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:12:27,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:12:27,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1640247393, now seen corresponding path program 48 times [2021-05-06 00:12:27,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:12:27,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519289559] [2021-05-06 00:12:27,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:12:27,658 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:12:27,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1809500520] [2021-05-06 00:12:27,658 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:12:27,783 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2021-05-06 00:12:27,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:12:27,788 WARN L261 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 221 conjunts are in the unsatisfiable core [2021-05-06 00:12:27,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:12:29,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:29,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:29,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:29,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:29,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:12:29,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:12:29,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519289559] [2021-05-06 00:12:29,753 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:12:29,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809500520] [2021-05-06 00:12:29,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809500520] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:12:29,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:12:29,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2021-05-06 00:12:29,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257992026] [2021-05-06 00:12:29,753 INFO L460 AbstractCegarLoop]: Interpolant automaton has 58 states [2021-05-06 00:12:29,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:12:29,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-05-06 00:12:29,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=3139, Unknown=0, NotChecked=0, Total=3306 [2021-05-06 00:12:29,754 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand has 58 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 58 states have internal predecessors, (61), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:31,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:12:31,570 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2021-05-06 00:12:31,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-05-06 00:12:31,570 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 58 states have internal predecessors, (61), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2021-05-06 00:12:31,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:12:31,570 INFO L225 Difference]: With dead ends: 69 [2021-05-06 00:12:31,570 INFO L226 Difference]: Without dead ends: 66 [2021-05-06 00:12:31,571 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1801.3ms TimeCoverageRelationStatistics Valid=172, Invalid=3250, Unknown=0, NotChecked=0, Total=3422 [2021-05-06 00:12:31,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-05-06 00:12:31,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-05-06 00:12:31,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 62 states have (on average 1.0161290322580645) internal successors, (63), 62 states have internal predecessors, (63), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:31,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2021-05-06 00:12:31,574 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2021-05-06 00:12:31,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:12:31,574 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2021-05-06 00:12:31,574 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 58 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 58 states have internal predecessors, (61), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:31,574 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2021-05-06 00:12:31,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-06 00:12:31,574 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:12:31,574 INFO L523 BasicCegarLoop]: trace histogram [49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:12:31,788 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-05-06 00:12:31,788 INFO L428 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:12:31,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:12:31,788 INFO L82 PathProgramCache]: Analyzing trace with hash -692000822, now seen corresponding path program 49 times [2021-05-06 00:12:31,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:12:31,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122410396] [2021-05-06 00:12:31,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:12:31,807 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:12:31,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1873059754] [2021-05-06 00:12:31,807 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:12:31,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 00:12:31,928 WARN L261 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 224 conjunts are in the unsatisfiable core [2021-05-06 00:12:31,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:12:33,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:33,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:33,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:33,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:33,631 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:12:33,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:12:33,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122410396] [2021-05-06 00:12:33,631 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:12:33,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873059754] [2021-05-06 00:12:33,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873059754] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:12:33,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:12:33,631 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2021-05-06 00:12:33,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804759887] [2021-05-06 00:12:33,631 INFO L460 AbstractCegarLoop]: Interpolant automaton has 58 states [2021-05-06 00:12:33,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:12:33,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-05-06 00:12:33,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=3193, Unknown=0, NotChecked=0, Total=3306 [2021-05-06 00:12:33,632 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand has 58 states, 58 states have (on average 1.0689655172413792) internal successors, (62), 58 states have internal predecessors, (62), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:35,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:12:35,523 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2021-05-06 00:12:35,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-05-06 00:12:35,523 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.0689655172413792) internal successors, (62), 58 states have internal predecessors, (62), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2021-05-06 00:12:35,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:12:35,524 INFO L225 Difference]: With dead ends: 70 [2021-05-06 00:12:35,524 INFO L226 Difference]: Without dead ends: 67 [2021-05-06 00:12:35,524 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1610.3ms TimeCoverageRelationStatistics Valid=117, Invalid=3305, Unknown=0, NotChecked=0, Total=3422 [2021-05-06 00:12:35,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-05-06 00:12:35,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2021-05-06 00:12:35,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 63 states have (on average 1.0158730158730158) internal successors, (64), 63 states have internal predecessors, (64), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:35,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2021-05-06 00:12:35,527 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2021-05-06 00:12:35,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:12:35,528 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2021-05-06 00:12:35,528 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 58 states, 58 states have (on average 1.0689655172413792) internal successors, (62), 58 states have internal predecessors, (62), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:35,528 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2021-05-06 00:12:35,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-06 00:12:35,528 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:12:35,528 INFO L523 BasicCegarLoop]: trace histogram [50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:12:35,741 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-05-06 00:12:35,741 INFO L428 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:12:35,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:12:35,742 INFO L82 PathProgramCache]: Analyzing trace with hash 22748545, now seen corresponding path program 50 times [2021-05-06 00:12:35,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:12:35,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652552572] [2021-05-06 00:12:35,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:12:35,748 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:12:35,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1556504694] [2021-05-06 00:12:35,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:12:35,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 00:12:35,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:12:35,840 WARN L261 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 228 conjunts are in the unsatisfiable core [2021-05-06 00:12:35,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:12:37,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:37,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:37,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:37,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:37,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:12:37,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:12:37,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652552572] [2021-05-06 00:12:37,314 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:12:37,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556504694] [2021-05-06 00:12:37,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556504694] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:12:37,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:12:37,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2021-05-06 00:12:37,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434744485] [2021-05-06 00:12:37,314 INFO L460 AbstractCegarLoop]: Interpolant automaton has 59 states [2021-05-06 00:12:37,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:12:37,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-05-06 00:12:37,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2021-05-06 00:12:37,315 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand has 59 states, 59 states have (on average 1.0677966101694916) internal successors, (63), 59 states have internal predecessors, (63), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:39,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:12:39,379 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2021-05-06 00:12:39,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-05-06 00:12:39,379 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.0677966101694916) internal successors, (63), 59 states have internal predecessors, (63), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2021-05-06 00:12:39,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:12:39,379 INFO L225 Difference]: With dead ends: 71 [2021-05-06 00:12:39,380 INFO L226 Difference]: Without dead ends: 68 [2021-05-06 00:12:39,380 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1403.1ms TimeCoverageRelationStatistics Valid=119, Invalid=3421, Unknown=0, NotChecked=0, Total=3540 [2021-05-06 00:12:39,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-06 00:12:39,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-05-06 00:12:39,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 64 states have (on average 1.015625) internal successors, (65), 64 states have internal predecessors, (65), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:39,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2021-05-06 00:12:39,383 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2021-05-06 00:12:39,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:12:39,383 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2021-05-06 00:12:39,383 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 59 states, 59 states have (on average 1.0677966101694916) internal successors, (63), 59 states have internal predecessors, (63), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:39,383 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2021-05-06 00:12:39,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-05-06 00:12:39,384 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:12:39,384 INFO L523 BasicCegarLoop]: trace histogram [51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:12:39,584 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2021-05-06 00:12:39,584 INFO L428 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:12:39,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:12:39,584 INFO L82 PathProgramCache]: Analyzing trace with hash 705142442, now seen corresponding path program 51 times [2021-05-06 00:12:39,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:12:39,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188510766] [2021-05-06 00:12:39,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:12:39,590 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:12:39,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1959228963] [2021-05-06 00:12:39,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:12:39,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2021-05-06 00:12:39,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:12:39,697 WARN L261 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 232 conjunts are in the unsatisfiable core [2021-05-06 00:12:39,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:12:41,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:41,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:41,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:41,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:41,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:12:41,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:12:41,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188510766] [2021-05-06 00:12:41,231 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:12:41,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959228963] [2021-05-06 00:12:41,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959228963] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:12:41,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:12:41,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2021-05-06 00:12:41,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297957280] [2021-05-06 00:12:41,232 INFO L460 AbstractCegarLoop]: Interpolant automaton has 60 states [2021-05-06 00:12:41,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:12:41,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-05-06 00:12:41,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=3423, Unknown=0, NotChecked=0, Total=3540 [2021-05-06 00:12:41,232 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand has 60 states, 60 states have (on average 1.0666666666666667) internal successors, (64), 60 states have internal predecessors, (64), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:43,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:12:43,306 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2021-05-06 00:12:43,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-05-06 00:12:43,306 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.0666666666666667) internal successors, (64), 60 states have internal predecessors, (64), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 67 [2021-05-06 00:12:43,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:12:43,306 INFO L225 Difference]: With dead ends: 72 [2021-05-06 00:12:43,306 INFO L226 Difference]: Without dead ends: 69 [2021-05-06 00:12:43,307 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1464.7ms TimeCoverageRelationStatistics Valid=121, Invalid=3539, Unknown=0, NotChecked=0, Total=3660 [2021-05-06 00:12:43,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-06 00:12:43,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-05-06 00:12:43,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 65 states have (on average 1.0153846153846153) internal successors, (66), 65 states have internal predecessors, (66), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:43,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2021-05-06 00:12:43,310 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2021-05-06 00:12:43,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:12:43,310 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2021-05-06 00:12:43,310 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 60 states, 60 states have (on average 1.0666666666666667) internal successors, (64), 60 states have internal predecessors, (64), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:43,310 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2021-05-06 00:12:43,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-06 00:12:43,311 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:12:43,311 INFO L523 BasicCegarLoop]: trace histogram [52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:12:43,529 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:12:43,529 INFO L428 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:12:43,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:12:43,529 INFO L82 PathProgramCache]: Analyzing trace with hash 384516769, now seen corresponding path program 52 times [2021-05-06 00:12:43,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:12:43,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878056961] [2021-05-06 00:12:43,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:12:43,535 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:12:43,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [177786233] [2021-05-06 00:12:43,535 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:12:43,636 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 00:12:43,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:12:43,679 WARN L261 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 236 conjunts are in the unsatisfiable core [2021-05-06 00:12:43,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:12:45,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:45,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:45,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:45,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:45,317 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:12:45,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:12:45,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878056961] [2021-05-06 00:12:45,317 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:12:45,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177786233] [2021-05-06 00:12:45,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177786233] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:12:45,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:12:45,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2021-05-06 00:12:45,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663206795] [2021-05-06 00:12:45,317 INFO L460 AbstractCegarLoop]: Interpolant automaton has 61 states [2021-05-06 00:12:45,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:12:45,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-05-06 00:12:45,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=3541, Unknown=0, NotChecked=0, Total=3660 [2021-05-06 00:12:45,318 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand has 61 states, 61 states have (on average 1.0655737704918034) internal successors, (65), 61 states have internal predecessors, (65), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:47,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:12:47,681 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2021-05-06 00:12:47,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-05-06 00:12:47,681 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.0655737704918034) internal successors, (65), 61 states have internal predecessors, (65), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2021-05-06 00:12:47,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:12:47,682 INFO L225 Difference]: With dead ends: 73 [2021-05-06 00:12:47,682 INFO L226 Difference]: Without dead ends: 70 [2021-05-06 00:12:47,682 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1569.6ms TimeCoverageRelationStatistics Valid=123, Invalid=3659, Unknown=0, NotChecked=0, Total=3782 [2021-05-06 00:12:47,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-05-06 00:12:47,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2021-05-06 00:12:47,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 66 states have (on average 1.0151515151515151) internal successors, (67), 66 states have internal predecessors, (67), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:47,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2021-05-06 00:12:47,685 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2021-05-06 00:12:47,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:12:47,685 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2021-05-06 00:12:47,685 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 61 states, 61 states have (on average 1.0655737704918034) internal successors, (65), 61 states have internal predecessors, (65), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:47,685 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2021-05-06 00:12:47,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-06 00:12:47,686 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:12:47,686 INFO L523 BasicCegarLoop]: trace histogram [53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:12:47,886 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-05-06 00:12:47,886 INFO L428 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:12:47,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:12:47,886 INFO L82 PathProgramCache]: Analyzing trace with hash -964944502, now seen corresponding path program 53 times [2021-05-06 00:12:47,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:12:47,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337162769] [2021-05-06 00:12:47,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:12:47,892 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:12:47,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [359718162] [2021-05-06 00:12:47,892 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:12:47,996 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2021-05-06 00:12:47,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:12:48,001 WARN L261 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 240 conjunts are in the unsatisfiable core [2021-05-06 00:12:48,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:12:49,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:49,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:49,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:49,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:49,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:12:49,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:12:49,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337162769] [2021-05-06 00:12:49,666 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:12:49,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359718162] [2021-05-06 00:12:49,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359718162] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:12:49,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:12:49,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2021-05-06 00:12:49,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012875494] [2021-05-06 00:12:49,667 INFO L460 AbstractCegarLoop]: Interpolant automaton has 62 states [2021-05-06 00:12:49,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:12:49,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-05-06 00:12:49,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=3661, Unknown=0, NotChecked=0, Total=3782 [2021-05-06 00:12:49,667 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand has 62 states, 62 states have (on average 1.064516129032258) internal successors, (66), 62 states have internal predecessors, (66), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:51,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:12:51,938 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2021-05-06 00:12:51,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-05-06 00:12:51,938 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.064516129032258) internal successors, (66), 62 states have internal predecessors, (66), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2021-05-06 00:12:51,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:12:51,939 INFO L225 Difference]: With dead ends: 74 [2021-05-06 00:12:51,939 INFO L226 Difference]: Without dead ends: 71 [2021-05-06 00:12:51,939 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1594.9ms TimeCoverageRelationStatistics Valid=125, Invalid=3781, Unknown=0, NotChecked=0, Total=3906 [2021-05-06 00:12:51,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-05-06 00:12:51,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-05-06 00:12:51,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 67 states have (on average 1.0149253731343284) internal successors, (68), 67 states have internal predecessors, (68), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:51,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2021-05-06 00:12:51,942 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2021-05-06 00:12:51,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:12:51,942 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2021-05-06 00:12:51,942 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 62 states, 62 states have (on average 1.064516129032258) internal successors, (66), 62 states have internal predecessors, (66), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:51,942 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2021-05-06 00:12:51,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-05-06 00:12:51,943 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:12:51,943 INFO L523 BasicCegarLoop]: trace histogram [54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:12:52,143 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-05-06 00:12:52,143 INFO L428 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:12:52,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:12:52,143 INFO L82 PathProgramCache]: Analyzing trace with hash 151429057, now seen corresponding path program 54 times [2021-05-06 00:12:52,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:12:52,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246918560] [2021-05-06 00:12:52,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:12:52,150 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:12:52,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1612343570] [2021-05-06 00:12:52,150 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:12:52,240 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2021-05-06 00:12:52,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:12:52,243 WARN L261 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 245 conjunts are in the unsatisfiable core [2021-05-06 00:12:52,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:12:54,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:54,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:54,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:54,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:54,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:12:54,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:12:54,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246918560] [2021-05-06 00:12:54,109 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:12:54,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612343570] [2021-05-06 00:12:54,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612343570] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:12:54,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:12:54,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2021-05-06 00:12:54,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612061306] [2021-05-06 00:12:54,109 INFO L460 AbstractCegarLoop]: Interpolant automaton has 64 states [2021-05-06 00:12:54,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:12:54,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-05-06 00:12:54,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=3847, Unknown=0, NotChecked=0, Total=4032 [2021-05-06 00:12:54,110 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand has 64 states, 64 states have (on average 1.046875) internal successors, (67), 64 states have internal predecessors, (67), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:56,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:12:56,761 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2021-05-06 00:12:56,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-05-06 00:12:56,761 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.046875) internal successors, (67), 64 states have internal predecessors, (67), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2021-05-06 00:12:56,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:12:56,761 INFO L225 Difference]: With dead ends: 75 [2021-05-06 00:12:56,761 INFO L226 Difference]: Without dead ends: 72 [2021-05-06 00:12:56,762 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1786.8ms TimeCoverageRelationStatistics Valid=190, Invalid=3970, Unknown=0, NotChecked=0, Total=4160 [2021-05-06 00:12:56,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-05-06 00:12:56,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2021-05-06 00:12:56,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 68 states have (on average 1.0147058823529411) internal successors, (69), 68 states have internal predecessors, (69), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:56,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2021-05-06 00:12:56,765 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2021-05-06 00:12:56,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:12:56,765 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2021-05-06 00:12:56,765 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 64 states, 64 states have (on average 1.046875) internal successors, (67), 64 states have internal predecessors, (67), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:12:56,765 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2021-05-06 00:12:56,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-05-06 00:12:56,766 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:12:56,766 INFO L523 BasicCegarLoop]: trace histogram [55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:12:56,966 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:12:56,966 INFO L428 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:12:56,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:12:56,967 INFO L82 PathProgramCache]: Analyzing trace with hash 399271018, now seen corresponding path program 55 times [2021-05-06 00:12:56,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:12:56,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114964701] [2021-05-06 00:12:56,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:12:56,972 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:12:56,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [598562730] [2021-05-06 00:12:56,973 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:12:57,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 00:12:57,059 WARN L261 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 248 conjunts are in the unsatisfiable core [2021-05-06 00:12:57,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:12:58,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:58,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:58,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:58,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:12:58,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:12:58,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:12:58,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114964701] [2021-05-06 00:12:58,877 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:12:58,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598562730] [2021-05-06 00:12:58,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598562730] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:12:58,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:12:58,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2021-05-06 00:12:58,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315516038] [2021-05-06 00:12:58,878 INFO L460 AbstractCegarLoop]: Interpolant automaton has 64 states [2021-05-06 00:12:58,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:12:58,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-05-06 00:12:58,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=3907, Unknown=0, NotChecked=0, Total=4032 [2021-05-06 00:12:58,878 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand has 64 states, 64 states have (on average 1.0625) internal successors, (68), 64 states have internal predecessors, (68), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:13:01,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:13:01,612 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2021-05-06 00:13:01,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-05-06 00:13:01,612 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.0625) internal successors, (68), 64 states have internal predecessors, (68), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2021-05-06 00:13:01,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:13:01,613 INFO L225 Difference]: With dead ends: 76 [2021-05-06 00:13:01,613 INFO L226 Difference]: Without dead ends: 73 [2021-05-06 00:13:01,613 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1731.9ms TimeCoverageRelationStatistics Valid=129, Invalid=4031, Unknown=0, NotChecked=0, Total=4160 [2021-05-06 00:13:01,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-05-06 00:13:01,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-05-06 00:13:01,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 69 states have (on average 1.0144927536231885) internal successors, (70), 69 states have internal predecessors, (70), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:13:01,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2021-05-06 00:13:01,617 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 71 [2021-05-06 00:13:01,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:13:01,617 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2021-05-06 00:13:01,617 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 64 states, 64 states have (on average 1.0625) internal successors, (68), 64 states have internal predecessors, (68), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:13:01,617 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2021-05-06 00:13:01,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-06 00:13:01,617 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:13:01,617 INFO L523 BasicCegarLoop]: trace histogram [56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:13:01,817 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:13:01,818 INFO L428 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:13:01,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:13:01,818 INFO L82 PathProgramCache]: Analyzing trace with hash -507562783, now seen corresponding path program 56 times [2021-05-06 00:13:01,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:13:01,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555165970] [2021-05-06 00:13:01,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:13:01,824 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:13:01,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1012921758] [2021-05-06 00:13:01,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:13:01,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 00:13:01,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:13:01,921 WARN L261 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 252 conjunts are in the unsatisfiable core [2021-05-06 00:13:01,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:13:03,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:03,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:03,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:03,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:03,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:13:03,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:13:03,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555165970] [2021-05-06 00:13:03,799 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:13:03,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012921758] [2021-05-06 00:13:03,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012921758] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:13:03,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:13:03,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2021-05-06 00:13:03,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396666897] [2021-05-06 00:13:03,799 INFO L460 AbstractCegarLoop]: Interpolant automaton has 65 states [2021-05-06 00:13:03,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:13:03,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-05-06 00:13:03,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=4033, Unknown=0, NotChecked=0, Total=4160 [2021-05-06 00:13:03,800 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand has 65 states, 65 states have (on average 1.0615384615384615) internal successors, (69), 65 states have internal predecessors, (69), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:13:06,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:13:06,783 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2021-05-06 00:13:06,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-05-06 00:13:06,784 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.0615384615384615) internal successors, (69), 65 states have internal predecessors, (69), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2021-05-06 00:13:06,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:13:06,784 INFO L225 Difference]: With dead ends: 77 [2021-05-06 00:13:06,784 INFO L226 Difference]: Without dead ends: 74 [2021-05-06 00:13:06,784 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1802.4ms TimeCoverageRelationStatistics Valid=131, Invalid=4159, Unknown=0, NotChecked=0, Total=4290 [2021-05-06 00:13:06,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-05-06 00:13:06,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-05-06 00:13:06,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 70 states have (on average 1.0142857142857142) internal successors, (71), 70 states have internal predecessors, (71), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:13:06,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2021-05-06 00:13:06,788 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 72 [2021-05-06 00:13:06,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:13:06,788 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2021-05-06 00:13:06,788 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 65 states, 65 states have (on average 1.0615384615384615) internal successors, (69), 65 states have internal predecessors, (69), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:13:06,788 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2021-05-06 00:13:06,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-06 00:13:06,788 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:13:06,788 INFO L523 BasicCegarLoop]: trace histogram [57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:13:07,010 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:13:07,011 INFO L428 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:13:07,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:13:07,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1445360458, now seen corresponding path program 57 times [2021-05-06 00:13:07,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:13:07,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785352764] [2021-05-06 00:13:07,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:13:07,017 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:13:07,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [519773271] [2021-05-06 00:13:07,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:13:07,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2021-05-06 00:13:07,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:13:07,146 WARN L261 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 256 conjunts are in the unsatisfiable core [2021-05-06 00:13:07,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:13:08,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:08,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:08,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:08,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:08,944 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:13:08,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:13:08,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785352764] [2021-05-06 00:13:08,944 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:13:08,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519773271] [2021-05-06 00:13:08,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519773271] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:13:08,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:13:08,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2021-05-06 00:13:08,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506142156] [2021-05-06 00:13:08,944 INFO L460 AbstractCegarLoop]: Interpolant automaton has 66 states [2021-05-06 00:13:08,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:13:08,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-05-06 00:13:08,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=4161, Unknown=0, NotChecked=0, Total=4290 [2021-05-06 00:13:08,945 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand has 66 states, 66 states have (on average 1.0606060606060606) internal successors, (70), 66 states have internal predecessors, (70), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:13:12,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:13:12,058 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2021-05-06 00:13:12,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-05-06 00:13:12,058 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.0606060606060606) internal successors, (70), 66 states have internal predecessors, (70), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2021-05-06 00:13:12,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:13:12,059 INFO L225 Difference]: With dead ends: 78 [2021-05-06 00:13:12,059 INFO L226 Difference]: Without dead ends: 75 [2021-05-06 00:13:12,059 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1727.0ms TimeCoverageRelationStatistics Valid=133, Invalid=4289, Unknown=0, NotChecked=0, Total=4422 [2021-05-06 00:13:12,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-05-06 00:13:12,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-05-06 00:13:12,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 71 states have (on average 1.0140845070422535) internal successors, (72), 71 states have internal predecessors, (72), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:13:12,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2021-05-06 00:13:12,063 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 73 [2021-05-06 00:13:12,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:13:12,063 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2021-05-06 00:13:12,063 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 66 states, 66 states have (on average 1.0606060606060606) internal successors, (70), 66 states have internal predecessors, (70), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:13:12,063 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2021-05-06 00:13:12,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-06 00:13:12,063 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:13:12,063 INFO L523 BasicCegarLoop]: trace histogram [58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:13:12,268 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable171 [2021-05-06 00:13:12,269 INFO L428 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:13:12,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:13:12,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1856438785, now seen corresponding path program 58 times [2021-05-06 00:13:12,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:13:12,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125695821] [2021-05-06 00:13:12,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:13:12,277 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:13:12,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2045177618] [2021-05-06 00:13:12,277 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:13:12,361 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 00:13:12,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:13:12,365 WARN L261 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 260 conjunts are in the unsatisfiable core [2021-05-06 00:13:12,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:13:14,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:14,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:14,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:14,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:14,273 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:13:14,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:13:14,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125695821] [2021-05-06 00:13:14,273 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:13:14,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045177618] [2021-05-06 00:13:14,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045177618] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:13:14,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:13:14,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2021-05-06 00:13:14,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957757318] [2021-05-06 00:13:14,273 INFO L460 AbstractCegarLoop]: Interpolant automaton has 67 states [2021-05-06 00:13:14,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:13:14,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-05-06 00:13:14,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=4291, Unknown=0, NotChecked=0, Total=4422 [2021-05-06 00:13:14,274 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand has 67 states, 67 states have (on average 1.0597014925373134) internal successors, (71), 67 states have internal predecessors, (71), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:13:17,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:13:17,797 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2021-05-06 00:13:17,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-05-06 00:13:17,798 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.0597014925373134) internal successors, (71), 67 states have internal predecessors, (71), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2021-05-06 00:13:17,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:13:17,798 INFO L225 Difference]: With dead ends: 79 [2021-05-06 00:13:17,798 INFO L226 Difference]: Without dead ends: 76 [2021-05-06 00:13:17,798 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1831.3ms TimeCoverageRelationStatistics Valid=135, Invalid=4421, Unknown=0, NotChecked=0, Total=4556 [2021-05-06 00:13:17,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-05-06 00:13:17,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2021-05-06 00:13:17,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 72 states have (on average 1.0138888888888888) internal successors, (73), 72 states have internal predecessors, (73), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:13:17,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2021-05-06 00:13:17,802 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 74 [2021-05-06 00:13:17,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:13:17,802 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2021-05-06 00:13:17,802 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 67 states, 67 states have (on average 1.0597014925373134) internal successors, (71), 67 states have internal predecessors, (71), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:13:17,803 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2021-05-06 00:13:17,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-06 00:13:17,803 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:13:17,803 INFO L523 BasicCegarLoop]: trace histogram [59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:13:18,019 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:13:18,020 INFO L428 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:13:18,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:13:18,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1714965034, now seen corresponding path program 59 times [2021-05-06 00:13:18,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:13:18,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987280658] [2021-05-06 00:13:18,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:13:18,026 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:13:18,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1286753078] [2021-05-06 00:13:18,026 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:13:18,132 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2021-05-06 00:13:18,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:13:18,138 WARN L261 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 264 conjunts are in the unsatisfiable core [2021-05-06 00:13:18,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:13:19,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:19,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:19,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:19,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:20,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:13:20,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:13:20,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987280658] [2021-05-06 00:13:20,053 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:13:20,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286753078] [2021-05-06 00:13:20,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286753078] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:13:20,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:13:20,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2021-05-06 00:13:20,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226550630] [2021-05-06 00:13:20,053 INFO L460 AbstractCegarLoop]: Interpolant automaton has 68 states [2021-05-06 00:13:20,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:13:20,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-05-06 00:13:20,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=4423, Unknown=0, NotChecked=0, Total=4556 [2021-05-06 00:13:20,054 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand has 68 states, 68 states have (on average 1.0588235294117647) internal successors, (72), 68 states have internal predecessors, (72), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:13:23,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:13:23,092 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2021-05-06 00:13:23,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-05-06 00:13:23,092 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.0588235294117647) internal successors, (72), 68 states have internal predecessors, (72), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2021-05-06 00:13:23,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:13:23,093 INFO L225 Difference]: With dead ends: 80 [2021-05-06 00:13:23,093 INFO L226 Difference]: Without dead ends: 77 [2021-05-06 00:13:23,093 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1827.8ms TimeCoverageRelationStatistics Valid=137, Invalid=4555, Unknown=0, NotChecked=0, Total=4692 [2021-05-06 00:13:23,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-05-06 00:13:23,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2021-05-06 00:13:23,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 73 states have (on average 1.0136986301369864) internal successors, (74), 73 states have internal predecessors, (74), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:13:23,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2021-05-06 00:13:23,097 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 75 [2021-05-06 00:13:23,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:13:23,097 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2021-05-06 00:13:23,097 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 68 states, 68 states have (on average 1.0588235294117647) internal successors, (72), 68 states have internal predecessors, (72), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:13:23,097 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2021-05-06 00:13:23,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-05-06 00:13:23,097 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:13:23,097 INFO L523 BasicCegarLoop]: trace histogram [60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:13:23,314 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-05-06 00:13:23,314 INFO L428 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:13:23,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:13:23,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1624246049, now seen corresponding path program 60 times [2021-05-06 00:13:23,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:13:23,315 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971149195] [2021-05-06 00:13:23,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:13:23,320 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:13:23,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1045842301] [2021-05-06 00:13:23,321 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:13:23,444 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2021-05-06 00:13:23,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:13:23,449 WARN L261 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 268 conjunts are in the unsatisfiable core [2021-05-06 00:13:23,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:13:25,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:25,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:25,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:25,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:25,561 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:13:25,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:13:25,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971149195] [2021-05-06 00:13:25,561 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:13:25,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045842301] [2021-05-06 00:13:25,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045842301] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:13:25,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:13:25,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69] total 69 [2021-05-06 00:13:25,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568884089] [2021-05-06 00:13:25,562 INFO L460 AbstractCegarLoop]: Interpolant automaton has 69 states [2021-05-06 00:13:25,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:13:25,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-05-06 00:13:25,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=4557, Unknown=0, NotChecked=0, Total=4692 [2021-05-06 00:13:25,562 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand has 69 states, 69 states have (on average 1.0579710144927537) internal successors, (73), 69 states have internal predecessors, (73), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:13:29,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:13:29,580 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2021-05-06 00:13:29,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-05-06 00:13:29,580 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.0579710144927537) internal successors, (73), 69 states have internal predecessors, (73), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2021-05-06 00:13:29,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:13:29,581 INFO L225 Difference]: With dead ends: 81 [2021-05-06 00:13:29,581 INFO L226 Difference]: Without dead ends: 78 [2021-05-06 00:13:29,581 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2022.0ms TimeCoverageRelationStatistics Valid=139, Invalid=4691, Unknown=0, NotChecked=0, Total=4830 [2021-05-06 00:13:29,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-05-06 00:13:29,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-05-06 00:13:29,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 74 states have (on average 1.0135135135135136) internal successors, (75), 74 states have internal predecessors, (75), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:13:29,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2021-05-06 00:13:29,585 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 76 [2021-05-06 00:13:29,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:13:29,585 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2021-05-06 00:13:29,585 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 69 states, 69 states have (on average 1.0579710144927537) internal successors, (73), 69 states have internal predecessors, (73), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:13:29,585 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2021-05-06 00:13:29,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-05-06 00:13:29,585 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:13:29,586 INFO L523 BasicCegarLoop]: trace histogram [61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:13:29,800 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:13:29,800 INFO L428 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:13:29,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:13:29,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1188042486, now seen corresponding path program 61 times [2021-05-06 00:13:29,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:13:29,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599963092] [2021-05-06 00:13:29,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:13:29,809 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:13:29,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1526560770] [2021-05-06 00:13:29,810 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:13:29,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 00:13:29,897 WARN L261 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 272 conjunts are in the unsatisfiable core [2021-05-06 00:13:29,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:13:31,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:31,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:31,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:31,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:31,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:13:31,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:13:31,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599963092] [2021-05-06 00:13:31,975 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:13:31,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526560770] [2021-05-06 00:13:31,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526560770] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:13:31,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:13:31,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2021-05-06 00:13:31,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585265724] [2021-05-06 00:13:31,976 INFO L460 AbstractCegarLoop]: Interpolant automaton has 70 states [2021-05-06 00:13:31,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:13:31,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-05-06 00:13:31,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=4693, Unknown=0, NotChecked=0, Total=4830 [2021-05-06 00:13:31,976 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand has 70 states, 70 states have (on average 1.0571428571428572) internal successors, (74), 70 states have internal predecessors, (74), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:13:36,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:13:36,407 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2021-05-06 00:13:36,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-05-06 00:13:36,408 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 1.0571428571428572) internal successors, (74), 70 states have internal predecessors, (74), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 77 [2021-05-06 00:13:36,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:13:36,408 INFO L225 Difference]: With dead ends: 82 [2021-05-06 00:13:36,408 INFO L226 Difference]: Without dead ends: 79 [2021-05-06 00:13:36,409 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2000.3ms TimeCoverageRelationStatistics Valid=141, Invalid=4829, Unknown=0, NotChecked=0, Total=4970 [2021-05-06 00:13:36,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-05-06 00:13:36,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2021-05-06 00:13:36,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 75 states have (on average 1.0133333333333334) internal successors, (76), 75 states have internal predecessors, (76), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:13:36,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2021-05-06 00:13:36,412 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 77 [2021-05-06 00:13:36,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:13:36,412 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2021-05-06 00:13:36,413 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 70 states, 70 states have (on average 1.0571428571428572) internal successors, (74), 70 states have internal predecessors, (74), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:13:36,413 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2021-05-06 00:13:36,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-05-06 00:13:36,413 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:13:36,413 INFO L523 BasicCegarLoop]: trace histogram [62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:13:36,624 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable183 [2021-05-06 00:13:36,625 INFO L428 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:13:36,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:13:36,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1825326145, now seen corresponding path program 62 times [2021-05-06 00:13:36,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:13:36,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067487932] [2021-05-06 00:13:36,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:13:36,632 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:13:36,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [60131525] [2021-05-06 00:13:36,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:13:36,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 00:13:36,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:13:36,745 WARN L261 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 276 conjunts are in the unsatisfiable core [2021-05-06 00:13:36,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:13:39,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:39,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:39,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:39,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:39,115 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:13:39,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:13:39,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067487932] [2021-05-06 00:13:39,116 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:13:39,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60131525] [2021-05-06 00:13:39,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60131525] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:13:39,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:13:39,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71] total 71 [2021-05-06 00:13:39,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878999278] [2021-05-06 00:13:39,116 INFO L460 AbstractCegarLoop]: Interpolant automaton has 71 states [2021-05-06 00:13:39,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:13:39,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-05-06 00:13:39,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=4831, Unknown=0, NotChecked=0, Total=4970 [2021-05-06 00:13:39,117 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand has 71 states, 71 states have (on average 1.056338028169014) internal successors, (75), 71 states have internal predecessors, (75), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:13:43,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:13:43,407 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2021-05-06 00:13:43,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-05-06 00:13:43,408 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.056338028169014) internal successors, (75), 71 states have internal predecessors, (75), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2021-05-06 00:13:43,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:13:43,408 INFO L225 Difference]: With dead ends: 83 [2021-05-06 00:13:43,408 INFO L226 Difference]: Without dead ends: 80 [2021-05-06 00:13:43,409 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2268.4ms TimeCoverageRelationStatistics Valid=143, Invalid=4969, Unknown=0, NotChecked=0, Total=5112 [2021-05-06 00:13:43,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-05-06 00:13:43,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-05-06 00:13:43,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 76 states have (on average 1.013157894736842) internal successors, (77), 76 states have internal predecessors, (77), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:13:43,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2021-05-06 00:13:43,412 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 78 [2021-05-06 00:13:43,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:13:43,412 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2021-05-06 00:13:43,413 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 71 states, 71 states have (on average 1.056338028169014) internal successors, (75), 71 states have internal predecessors, (75), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:13:43,413 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2021-05-06 00:13:43,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-06 00:13:43,413 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:13:43,413 INFO L523 BasicCegarLoop]: trace histogram [63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:13:43,613 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:13:43,613 INFO L428 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:13:43,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:13:43,614 INFO L82 PathProgramCache]: Analyzing trace with hash 750473194, now seen corresponding path program 63 times [2021-05-06 00:13:43,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:13:43,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446603647] [2021-05-06 00:13:43,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:13:43,621 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:13:43,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1975351826] [2021-05-06 00:13:43,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:13:43,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2021-05-06 00:13:43,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:13:43,778 WARN L261 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 280 conjunts are in the unsatisfiable core [2021-05-06 00:13:43,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:13:46,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:46,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:46,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:46,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:46,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:13:46,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:13:46,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446603647] [2021-05-06 00:13:46,215 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:13:46,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975351826] [2021-05-06 00:13:46,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975351826] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:13:46,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:13:46,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2021-05-06 00:13:46,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752098232] [2021-05-06 00:13:46,215 INFO L460 AbstractCegarLoop]: Interpolant automaton has 72 states [2021-05-06 00:13:46,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:13:46,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-05-06 00:13:46,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=4971, Unknown=0, NotChecked=0, Total=5112 [2021-05-06 00:13:46,216 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand has 72 states, 72 states have (on average 1.0555555555555556) internal successors, (76), 72 states have internal predecessors, (76), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:13:51,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:13:51,406 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2021-05-06 00:13:51,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-05-06 00:13:51,407 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.0555555555555556) internal successors, (76), 72 states have internal predecessors, (76), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 79 [2021-05-06 00:13:51,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:13:51,407 INFO L225 Difference]: With dead ends: 84 [2021-05-06 00:13:51,407 INFO L226 Difference]: Without dead ends: 81 [2021-05-06 00:13:51,408 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2349.9ms TimeCoverageRelationStatistics Valid=145, Invalid=5111, Unknown=0, NotChecked=0, Total=5256 [2021-05-06 00:13:51,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-05-06 00:13:51,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-05-06 00:13:51,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 77 states have (on average 1.0129870129870129) internal successors, (78), 77 states have internal predecessors, (78), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:13:51,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2021-05-06 00:13:51,412 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 79 [2021-05-06 00:13:51,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:13:51,412 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2021-05-06 00:13:51,412 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 72 states, 72 states have (on average 1.0555555555555556) internal successors, (76), 72 states have internal predecessors, (76), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:13:51,412 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2021-05-06 00:13:51,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-06 00:13:51,412 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:13:51,412 INFO L523 BasicCegarLoop]: trace histogram [64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:13:51,624 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-05-06 00:13:51,625 INFO L428 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:13:51,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:13:51,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1789770081, now seen corresponding path program 64 times [2021-05-06 00:13:51,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:13:51,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258103235] [2021-05-06 00:13:51,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:13:51,631 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:13:51,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [649775852] [2021-05-06 00:13:51,631 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:13:51,726 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 00:13:51,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:13:51,730 WARN L261 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 284 conjunts are in the unsatisfiable core [2021-05-06 00:13:51,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:13:54,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:54,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:54,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:54,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:13:54,168 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:13:54,168 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:13:54,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258103235] [2021-05-06 00:13:54,168 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:13:54,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649775852] [2021-05-06 00:13:54,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649775852] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:13:54,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:13:54,168 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73] total 73 [2021-05-06 00:13:54,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636820255] [2021-05-06 00:13:54,168 INFO L460 AbstractCegarLoop]: Interpolant automaton has 73 states [2021-05-06 00:13:54,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:13:54,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-05-06 00:13:54,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=5113, Unknown=0, NotChecked=0, Total=5256 [2021-05-06 00:13:54,169 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand has 73 states, 73 states have (on average 1.0547945205479452) internal successors, (77), 73 states have internal predecessors, (77), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:13:59,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:13:59,208 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2021-05-06 00:13:59,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-05-06 00:13:59,208 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.0547945205479452) internal successors, (77), 73 states have internal predecessors, (77), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2021-05-06 00:13:59,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:13:59,209 INFO L225 Difference]: With dead ends: 85 [2021-05-06 00:13:59,209 INFO L226 Difference]: Without dead ends: 82 [2021-05-06 00:13:59,209 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2340.9ms TimeCoverageRelationStatistics Valid=147, Invalid=5255, Unknown=0, NotChecked=0, Total=5402 [2021-05-06 00:13:59,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-05-06 00:13:59,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2021-05-06 00:13:59,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 78 states have (on average 1.0128205128205128) internal successors, (79), 78 states have internal predecessors, (79), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:13:59,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2021-05-06 00:13:59,213 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 80 [2021-05-06 00:13:59,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:13:59,213 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2021-05-06 00:13:59,213 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 73 states, 73 states have (on average 1.0547945205479452) internal successors, (77), 73 states have internal predecessors, (77), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:13:59,213 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2021-05-06 00:13:59,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-05-06 00:13:59,213 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:13:59,213 INFO L523 BasicCegarLoop]: trace histogram [65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:13:59,425 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable192 [2021-05-06 00:13:59,425 INFO L428 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:13:59,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:13:59,425 INFO L82 PathProgramCache]: Analyzing trace with hash -351764790, now seen corresponding path program 65 times [2021-05-06 00:13:59,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:13:59,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408394639] [2021-05-06 00:13:59,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:13:59,431 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:13:59,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1024845872] [2021-05-06 00:13:59,431 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:13:59,547 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2021-05-06 00:13:59,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:13:59,552 WARN L261 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 288 conjunts are in the unsatisfiable core [2021-05-06 00:13:59,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:14:01,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:14:01,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:14:01,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:14:01,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:14:01,883 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:14:01,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:14:01,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408394639] [2021-05-06 00:14:01,883 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:14:01,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024845872] [2021-05-06 00:14:01,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024845872] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:14:01,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:14:01,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74] total 74 [2021-05-06 00:14:01,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963081697] [2021-05-06 00:14:01,884 INFO L460 AbstractCegarLoop]: Interpolant automaton has 74 states [2021-05-06 00:14:01,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:14:01,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-05-06 00:14:01,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=5257, Unknown=0, NotChecked=0, Total=5402 [2021-05-06 00:14:01,887 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand has 74 states, 74 states have (on average 1.054054054054054) internal successors, (78), 74 states have internal predecessors, (78), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:14:07,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:14:07,507 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2021-05-06 00:14:07,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-05-06 00:14:07,508 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.054054054054054) internal successors, (78), 74 states have internal predecessors, (78), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 81 [2021-05-06 00:14:07,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:14:07,508 INFO L225 Difference]: With dead ends: 86 [2021-05-06 00:14:07,508 INFO L226 Difference]: Without dead ends: 83 [2021-05-06 00:14:07,508 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2237.6ms TimeCoverageRelationStatistics Valid=149, Invalid=5401, Unknown=0, NotChecked=0, Total=5550 [2021-05-06 00:14:07,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-05-06 00:14:07,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-05-06 00:14:07,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 79 states have (on average 1.0126582278481013) internal successors, (80), 79 states have internal predecessors, (80), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:14:07,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2021-05-06 00:14:07,512 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 81 [2021-05-06 00:14:07,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:14:07,513 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2021-05-06 00:14:07,513 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 74 states, 74 states have (on average 1.054054054054054) internal successors, (78), 74 states have internal predecessors, (78), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:14:07,513 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2021-05-06 00:14:07,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-05-06 00:14:07,513 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:14:07,513 INFO L523 BasicCegarLoop]: trace histogram [66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:14:07,728 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:14:07,729 INFO L428 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:14:07,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:14:07,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1980130945, now seen corresponding path program 66 times [2021-05-06 00:14:07,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:14:07,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739190007] [2021-05-06 00:14:07,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:14:07,735 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:14:07,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1297219095] [2021-05-06 00:14:07,735 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:14:07,844 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2021-05-06 00:14:07,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:14:07,848 WARN L261 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 293 conjunts are in the unsatisfiable core [2021-05-06 00:14:07,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:14:10,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:14:10,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:14:10,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:14:10,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:14:10,452 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:14:10,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:14:10,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739190007] [2021-05-06 00:14:10,452 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:14:10,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297219095] [2021-05-06 00:14:10,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297219095] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:14:10,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:14:10,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76] total 76 [2021-05-06 00:14:10,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246247827] [2021-05-06 00:14:10,453 INFO L460 AbstractCegarLoop]: Interpolant automaton has 76 states [2021-05-06 00:14:10,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:14:10,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-05-06 00:14:10,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=5479, Unknown=0, NotChecked=0, Total=5700 [2021-05-06 00:14:10,453 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand has 76 states, 76 states have (on average 1.0394736842105263) internal successors, (79), 76 states have internal predecessors, (79), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:14:16,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:14:16,846 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2021-05-06 00:14:16,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-05-06 00:14:16,847 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 1.0394736842105263) internal successors, (79), 76 states have internal predecessors, (79), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 82 [2021-05-06 00:14:16,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:14:16,847 INFO L225 Difference]: With dead ends: 87 [2021-05-06 00:14:16,847 INFO L226 Difference]: Without dead ends: 84 [2021-05-06 00:14:16,848 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 2509.9ms TimeCoverageRelationStatistics Valid=226, Invalid=5626, Unknown=0, NotChecked=0, Total=5852 [2021-05-06 00:14:16,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-05-06 00:14:16,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-05-06 00:14:16,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 80 states have (on average 1.0125) internal successors, (81), 80 states have internal predecessors, (81), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:14:16,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2021-05-06 00:14:16,855 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 82 [2021-05-06 00:14:16,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:14:16,855 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2021-05-06 00:14:16,855 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 76 states, 76 states have (on average 1.0394736842105263) internal successors, (79), 76 states have internal predecessors, (79), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:14:16,856 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2021-05-06 00:14:16,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-05-06 00:14:16,856 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:14:16,856 INFO L523 BasicCegarLoop]: trace histogram [67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:14:17,068 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:14:17,069 INFO L428 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:14:17,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:14:17,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1254454698, now seen corresponding path program 67 times [2021-05-06 00:14:17,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:14:17,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078452916] [2021-05-06 00:14:17,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:14:17,075 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:14:17,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1191582298] [2021-05-06 00:14:17,075 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:14:17,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 00:14:17,182 WARN L261 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 296 conjunts are in the unsatisfiable core [2021-05-06 00:14:17,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:14:19,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:14:19,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:14:19,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:14:19,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:14:19,547 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:14:19,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:14:19,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078452916] [2021-05-06 00:14:19,547 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:14:19,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191582298] [2021-05-06 00:14:19,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191582298] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:14:19,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:14:19,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76] total 76 [2021-05-06 00:14:19,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196464313] [2021-05-06 00:14:19,548 INFO L460 AbstractCegarLoop]: Interpolant automaton has 76 states [2021-05-06 00:14:19,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:14:19,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-05-06 00:14:19,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=5551, Unknown=0, NotChecked=0, Total=5700 [2021-05-06 00:14:19,548 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand has 76 states, 76 states have (on average 1.0526315789473684) internal successors, (80), 76 states have internal predecessors, (80), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:14:25,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:14:25,590 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2021-05-06 00:14:25,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-05-06 00:14:25,590 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 1.0526315789473684) internal successors, (80), 76 states have internal predecessors, (80), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2021-05-06 00:14:25,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:14:25,591 INFO L225 Difference]: With dead ends: 88 [2021-05-06 00:14:25,591 INFO L226 Difference]: Without dead ends: 85 [2021-05-06 00:14:25,591 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2281.6ms TimeCoverageRelationStatistics Valid=153, Invalid=5699, Unknown=0, NotChecked=0, Total=5852 [2021-05-06 00:14:25,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-05-06 00:14:25,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2021-05-06 00:14:25,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 81 states have (on average 1.0123456790123457) internal successors, (82), 81 states have internal predecessors, (82), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:14:25,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2021-05-06 00:14:25,595 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 83 [2021-05-06 00:14:25,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:14:25,595 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2021-05-06 00:14:25,595 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 76 states, 76 states have (on average 1.0526315789473684) internal successors, (80), 76 states have internal predecessors, (80), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:14:25,595 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2021-05-06 00:14:25,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-05-06 00:14:25,596 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:14:25,596 INFO L523 BasicCegarLoop]: trace histogram [68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:14:25,796 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-05-06 00:14:25,796 INFO L428 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:14:25,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:14:25,796 INFO L82 PathProgramCache]: Analyzing trace with hash 233327521, now seen corresponding path program 68 times [2021-05-06 00:14:25,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:14:25,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067419534] [2021-05-06 00:14:25,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:14:25,802 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:14:25,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [991587651] [2021-05-06 00:14:25,803 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:14:25,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 00:14:25,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:14:25,914 WARN L261 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 300 conjunts are in the unsatisfiable core [2021-05-06 00:14:25,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:14:28,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:14:28,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:14:28,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:14:28,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:14:28,425 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:14:28,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:14:28,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067419534] [2021-05-06 00:14:28,425 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:14:28,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991587651] [2021-05-06 00:14:28,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991587651] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:14:28,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:14:28,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77] total 77 [2021-05-06 00:14:28,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994553497] [2021-05-06 00:14:28,426 INFO L460 AbstractCegarLoop]: Interpolant automaton has 77 states [2021-05-06 00:14:28,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:14:28,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-05-06 00:14:28,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=5701, Unknown=0, NotChecked=0, Total=5852 [2021-05-06 00:14:28,426 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand has 77 states, 77 states have (on average 1.051948051948052) internal successors, (81), 77 states have internal predecessors, (81), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:14:34,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:14:34,885 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2021-05-06 00:14:34,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-05-06 00:14:34,886 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 1.051948051948052) internal successors, (81), 77 states have internal predecessors, (81), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 84 [2021-05-06 00:14:34,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:14:34,886 INFO L225 Difference]: With dead ends: 89 [2021-05-06 00:14:34,886 INFO L226 Difference]: Without dead ends: 86 [2021-05-06 00:14:34,886 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2418.6ms TimeCoverageRelationStatistics Valid=155, Invalid=5851, Unknown=0, NotChecked=0, Total=6006 [2021-05-06 00:14:34,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-05-06 00:14:34,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2021-05-06 00:14:34,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 82 states have (on average 1.0121951219512195) internal successors, (83), 82 states have internal predecessors, (83), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:14:34,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2021-05-06 00:14:34,890 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 84 [2021-05-06 00:14:34,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:14:34,890 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2021-05-06 00:14:34,890 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 77 states, 77 states have (on average 1.051948051948052) internal successors, (81), 77 states have internal predecessors, (81), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:14:34,891 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2021-05-06 00:14:34,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-06 00:14:34,891 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:14:34,891 INFO L523 BasicCegarLoop]: trace histogram [69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:14:35,091 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:14:35,091 INFO L428 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:14:35,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:14:35,092 INFO L82 PathProgramCache]: Analyzing trace with hash -1356843894, now seen corresponding path program 69 times [2021-05-06 00:14:35,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:14:35,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230162971] [2021-05-06 00:14:35,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:14:35,097 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:14:35,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1306258710] [2021-05-06 00:14:35,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:14:35,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2021-05-06 00:14:35,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:14:35,260 WARN L261 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 304 conjunts are in the unsatisfiable core [2021-05-06 00:14:35,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:14:37,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:14:37,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:14:37,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:14:37,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:14:37,983 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:14:37,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:14:37,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230162971] [2021-05-06 00:14:37,984 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:14:37,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306258710] [2021-05-06 00:14:37,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306258710] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:14:37,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:14:37,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78] total 78 [2021-05-06 00:14:37,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813239974] [2021-05-06 00:14:37,984 INFO L460 AbstractCegarLoop]: Interpolant automaton has 78 states [2021-05-06 00:14:37,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:14:37,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-05-06 00:14:37,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=5853, Unknown=0, NotChecked=0, Total=6006 [2021-05-06 00:14:37,985 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand has 78 states, 78 states have (on average 1.0512820512820513) internal successors, (82), 78 states have internal predecessors, (82), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:14:46,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:14:46,316 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2021-05-06 00:14:46,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-05-06 00:14:46,316 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 1.0512820512820513) internal successors, (82), 78 states have internal predecessors, (82), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 85 [2021-05-06 00:14:46,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:14:46,316 INFO L225 Difference]: With dead ends: 90 [2021-05-06 00:14:46,316 INFO L226 Difference]: Without dead ends: 87 [2021-05-06 00:14:46,317 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2636.1ms TimeCoverageRelationStatistics Valid=157, Invalid=6005, Unknown=0, NotChecked=0, Total=6162 [2021-05-06 00:14:46,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-05-06 00:14:46,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2021-05-06 00:14:46,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 83 states have (on average 1.0120481927710843) internal successors, (84), 83 states have internal predecessors, (84), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:14:46,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2021-05-06 00:14:46,321 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 85 [2021-05-06 00:14:46,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:14:46,321 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2021-05-06 00:14:46,321 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 78 states, 78 states have (on average 1.0512820512820513) internal successors, (82), 78 states have internal predecessors, (82), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:14:46,321 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2021-05-06 00:14:46,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-06 00:14:46,321 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:14:46,321 INFO L523 BasicCegarLoop]: trace histogram [70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:14:46,522 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable207 [2021-05-06 00:14:46,522 INFO L428 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:14:46,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:14:46,522 INFO L82 PathProgramCache]: Analyzing trace with hash 887449793, now seen corresponding path program 70 times [2021-05-06 00:14:46,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:14:46,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345632584] [2021-05-06 00:14:46,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:14:46,528 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:14:46,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [227799689] [2021-05-06 00:14:46,528 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:14:46,616 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 00:14:46,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:14:46,620 WARN L261 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 308 conjunts are in the unsatisfiable core [2021-05-06 00:14:46,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:14:49,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:14:49,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:14:49,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:14:49,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:14:49,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:14:49,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:14:49,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345632584] [2021-05-06 00:14:49,482 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:14:49,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227799689] [2021-05-06 00:14:49,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227799689] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:14:49,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:14:49,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79] total 79 [2021-05-06 00:14:49,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843090051] [2021-05-06 00:14:49,483 INFO L460 AbstractCegarLoop]: Interpolant automaton has 79 states [2021-05-06 00:14:49,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:14:49,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-05-06 00:14:49,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=6007, Unknown=0, NotChecked=0, Total=6162 [2021-05-06 00:14:49,483 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand has 79 states, 79 states have (on average 1.0506329113924051) internal successors, (83), 79 states have internal predecessors, (83), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:14:59,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:14:59,291 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2021-05-06 00:14:59,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-05-06 00:14:59,291 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 1.0506329113924051) internal successors, (83), 79 states have internal predecessors, (83), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 86 [2021-05-06 00:14:59,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:14:59,292 INFO L225 Difference]: With dead ends: 91 [2021-05-06 00:14:59,292 INFO L226 Difference]: Without dead ends: 88 [2021-05-06 00:14:59,292 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2758.7ms TimeCoverageRelationStatistics Valid=159, Invalid=6161, Unknown=0, NotChecked=0, Total=6320 [2021-05-06 00:14:59,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-05-06 00:14:59,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2021-05-06 00:14:59,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 84 states have (on average 1.0119047619047619) internal successors, (85), 84 states have internal predecessors, (85), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:14:59,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2021-05-06 00:14:59,296 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 86 [2021-05-06 00:14:59,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:14:59,296 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2021-05-06 00:14:59,296 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 79 states, 79 states have (on average 1.0506329113924051) internal successors, (83), 79 states have internal predecessors, (83), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:14:59,296 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2021-05-06 00:14:59,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-06 00:14:59,297 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:14:59,297 INFO L523 BasicCegarLoop]: trace histogram [71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:14:59,498 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2021-05-06 00:14:59,498 INFO L428 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:14:59,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:14:59,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1741077354, now seen corresponding path program 71 times [2021-05-06 00:14:59,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:14:59,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619536543] [2021-05-06 00:14:59,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:14:59,505 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:14:59,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [770091527] [2021-05-06 00:14:59,505 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:14:59,636 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2021-05-06 00:14:59,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:14:59,642 WARN L261 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 312 conjunts are in the unsatisfiable core [2021-05-06 00:14:59,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:15:02,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:15:02,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:15:02,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:15:02,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:15:02,629 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:15:02,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:15:02,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619536543] [2021-05-06 00:15:02,630 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:15:02,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770091527] [2021-05-06 00:15:02,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770091527] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:15:02,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:15:02,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80] total 80 [2021-05-06 00:15:02,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250236735] [2021-05-06 00:15:02,630 INFO L460 AbstractCegarLoop]: Interpolant automaton has 80 states [2021-05-06 00:15:02,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:15:02,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-05-06 00:15:02,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=6163, Unknown=0, NotChecked=0, Total=6320 [2021-05-06 00:15:02,631 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand has 80 states, 80 states have (on average 1.05) internal successors, (84), 80 states have internal predecessors, (84), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:15:12,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:15:12,254 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2021-05-06 00:15:12,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-05-06 00:15:12,254 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.05) internal successors, (84), 80 states have internal predecessors, (84), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 87 [2021-05-06 00:15:12,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:15:12,254 INFO L225 Difference]: With dead ends: 92 [2021-05-06 00:15:12,254 INFO L226 Difference]: Without dead ends: 89 [2021-05-06 00:15:12,255 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2894.7ms TimeCoverageRelationStatistics Valid=161, Invalid=6319, Unknown=0, NotChecked=0, Total=6480 [2021-05-06 00:15:12,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-05-06 00:15:12,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-05-06 00:15:12,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 85 states have (on average 1.011764705882353) internal successors, (86), 85 states have internal predecessors, (86), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:15:12,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2021-05-06 00:15:12,270 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 87 [2021-05-06 00:15:12,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:15:12,270 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2021-05-06 00:15:12,271 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 80 states, 80 states have (on average 1.05) internal successors, (84), 80 states have internal predecessors, (84), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:15:12,271 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2021-05-06 00:15:12,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-05-06 00:15:12,271 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:15:12,271 INFO L523 BasicCegarLoop]: trace histogram [72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:15:12,484 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-05-06 00:15:12,485 INFO L428 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:15:12,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:15:12,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1861239327, now seen corresponding path program 72 times [2021-05-06 00:15:12,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:15:12,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815374204] [2021-05-06 00:15:12,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:15:12,491 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:15:12,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [80718223] [2021-05-06 00:15:12,491 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:15:12,603 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2021-05-06 00:15:12,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:15:12,610 WARN L261 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 317 conjunts are in the unsatisfiable core [2021-05-06 00:15:12,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:15:15,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:15:15,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:15:15,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:15:15,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:15:15,828 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:15:15,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:15:15,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815374204] [2021-05-06 00:15:15,829 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:15:15,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80718223] [2021-05-06 00:15:15,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80718223] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:15:15,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:15:15,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82] total 82 [2021-05-06 00:15:15,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410857039] [2021-05-06 00:15:15,829 INFO L460 AbstractCegarLoop]: Interpolant automaton has 82 states [2021-05-06 00:15:15,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:15:15,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-05-06 00:15:15,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=6403, Unknown=0, NotChecked=0, Total=6642 [2021-05-06 00:15:15,830 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand has 82 states, 82 states have (on average 1.0365853658536586) internal successors, (85), 82 states have internal predecessors, (85), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:15:26,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:15:26,231 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2021-05-06 00:15:26,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-05-06 00:15:26,231 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 1.0365853658536586) internal successors, (85), 82 states have internal predecessors, (85), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 88 [2021-05-06 00:15:26,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:15:26,231 INFO L225 Difference]: With dead ends: 93 [2021-05-06 00:15:26,231 INFO L226 Difference]: Without dead ends: 90 [2021-05-06 00:15:26,232 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 3117.2ms TimeCoverageRelationStatistics Valid=244, Invalid=6562, Unknown=0, NotChecked=0, Total=6806 [2021-05-06 00:15:26,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-05-06 00:15:26,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2021-05-06 00:15:26,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 86 states have (on average 1.0116279069767442) internal successors, (87), 86 states have internal predecessors, (87), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:15:26,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2021-05-06 00:15:26,236 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 88 [2021-05-06 00:15:26,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:15:26,236 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2021-05-06 00:15:26,236 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 82 states, 82 states have (on average 1.0365853658536586) internal successors, (85), 82 states have internal predecessors, (85), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:15:26,236 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2021-05-06 00:15:26,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-06 00:15:26,236 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:15:26,236 INFO L523 BasicCegarLoop]: trace histogram [73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:15:26,444 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:15:26,445 INFO L428 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:15:26,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:15:26,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1863906742, now seen corresponding path program 73 times [2021-05-06 00:15:26,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:15:26,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803889968] [2021-05-06 00:15:26,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:15:26,451 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:15:26,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [804873407] [2021-05-06 00:15:26,451 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:15:26,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 00:15:26,565 WARN L261 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 320 conjunts are in the unsatisfiable core [2021-05-06 00:15:26,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:15:29,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:15:29,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:15:29,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:15:29,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:15:29,357 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:15:29,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:15:29,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803889968] [2021-05-06 00:15:29,358 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:15:29,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804873407] [2021-05-06 00:15:29,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804873407] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:15:29,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:15:29,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82] total 82 [2021-05-06 00:15:29,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953181654] [2021-05-06 00:15:29,358 INFO L460 AbstractCegarLoop]: Interpolant automaton has 82 states [2021-05-06 00:15:29,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:15:29,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-05-06 00:15:29,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=6481, Unknown=0, NotChecked=0, Total=6642 [2021-05-06 00:15:29,359 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand has 82 states, 82 states have (on average 1.048780487804878) internal successors, (86), 82 states have internal predecessors, (86), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:15:39,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:15:39,626 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2021-05-06 00:15:39,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-05-06 00:15:39,627 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 1.048780487804878) internal successors, (86), 82 states have internal predecessors, (86), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 89 [2021-05-06 00:15:39,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:15:39,627 INFO L225 Difference]: With dead ends: 94 [2021-05-06 00:15:39,627 INFO L226 Difference]: Without dead ends: 91 [2021-05-06 00:15:39,627 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2701.2ms TimeCoverageRelationStatistics Valid=165, Invalid=6641, Unknown=0, NotChecked=0, Total=6806 [2021-05-06 00:15:39,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-05-06 00:15:39,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2021-05-06 00:15:39,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 87 states have (on average 1.0114942528735633) internal successors, (88), 87 states have internal predecessors, (88), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:15:39,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2021-05-06 00:15:39,632 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 89 [2021-05-06 00:15:39,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:15:39,632 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2021-05-06 00:15:39,632 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 82 states, 82 states have (on average 1.048780487804878) internal successors, (86), 82 states have internal predecessors, (86), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:15:39,632 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2021-05-06 00:15:39,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-06 00:15:39,632 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:15:39,632 INFO L523 BasicCegarLoop]: trace histogram [74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:15:39,836 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable219 [2021-05-06 00:15:39,836 INFO L428 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:15:39,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:15:39,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1946596607, now seen corresponding path program 74 times [2021-05-06 00:15:39,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:15:39,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081460330] [2021-05-06 00:15:39,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:15:39,842 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:15:39,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [772481518] [2021-05-06 00:15:39,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:15:39,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 00:15:39,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:15:39,976 WARN L261 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 324 conjunts are in the unsatisfiable core [2021-05-06 00:15:39,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:15:43,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:15:43,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:15:43,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:15:43,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:15:43,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:15:43,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:15:43,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081460330] [2021-05-06 00:15:43,204 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:15:43,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772481518] [2021-05-06 00:15:43,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772481518] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:15:43,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:15:43,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83] total 83 [2021-05-06 00:15:43,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020825619] [2021-05-06 00:15:43,205 INFO L460 AbstractCegarLoop]: Interpolant automaton has 83 states [2021-05-06 00:15:43,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:15:43,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-05-06 00:15:43,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=6643, Unknown=0, NotChecked=0, Total=6806 [2021-05-06 00:15:43,205 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand has 83 states, 83 states have (on average 1.0481927710843373) internal successors, (87), 83 states have internal predecessors, (87), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:15:54,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:15:54,524 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2021-05-06 00:15:54,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-05-06 00:15:54,525 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 1.0481927710843373) internal successors, (87), 83 states have internal predecessors, (87), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 90 [2021-05-06 00:15:54,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:15:54,525 INFO L225 Difference]: With dead ends: 95 [2021-05-06 00:15:54,525 INFO L226 Difference]: Without dead ends: 92 [2021-05-06 00:15:54,525 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3134.8ms TimeCoverageRelationStatistics Valid=167, Invalid=6805, Unknown=0, NotChecked=0, Total=6972 [2021-05-06 00:15:54,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-05-06 00:15:54,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2021-05-06 00:15:54,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 88 states have (on average 1.0113636363636365) internal successors, (89), 88 states have internal predecessors, (89), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:15:54,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2021-05-06 00:15:54,530 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 90 [2021-05-06 00:15:54,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:15:54,530 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2021-05-06 00:15:54,530 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 83 states, 83 states have (on average 1.0481927710843373) internal successors, (87), 83 states have internal predecessors, (87), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:15:54,530 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2021-05-06 00:15:54,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-05-06 00:15:54,530 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:15:54,530 INFO L523 BasicCegarLoop]: trace histogram [75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:15:54,732 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable222,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:15:54,733 INFO L428 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:15:54,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:15:54,733 INFO L82 PathProgramCache]: Analyzing trace with hash -215015126, now seen corresponding path program 75 times [2021-05-06 00:15:54,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:15:54,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040057184] [2021-05-06 00:15:54,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:15:54,739 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:15:54,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [920866914] [2021-05-06 00:15:54,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:15:54,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2021-05-06 00:15:54,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:15:54,921 WARN L261 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 328 conjunts are in the unsatisfiable core [2021-05-06 00:15:54,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:15:57,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:15:57,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:15:57,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:15:57,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:15:58,036 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:15:58,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:15:58,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040057184] [2021-05-06 00:15:58,036 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:15:58,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920866914] [2021-05-06 00:15:58,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920866914] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:15:58,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:15:58,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84] total 84 [2021-05-06 00:15:58,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139719195] [2021-05-06 00:15:58,037 INFO L460 AbstractCegarLoop]: Interpolant automaton has 84 states [2021-05-06 00:15:58,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:15:58,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-05-06 00:15:58,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=6807, Unknown=0, NotChecked=0, Total=6972 [2021-05-06 00:15:58,037 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand has 84 states, 84 states have (on average 1.0476190476190477) internal successors, (88), 84 states have internal predecessors, (88), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:16:11,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:16:11,048 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2021-05-06 00:16:11,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-05-06 00:16:11,049 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 1.0476190476190477) internal successors, (88), 84 states have internal predecessors, (88), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 91 [2021-05-06 00:16:11,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:16:11,049 INFO L225 Difference]: With dead ends: 96 [2021-05-06 00:16:11,049 INFO L226 Difference]: Without dead ends: 93 [2021-05-06 00:16:11,049 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3022.7ms TimeCoverageRelationStatistics Valid=169, Invalid=6971, Unknown=0, NotChecked=0, Total=7140 [2021-05-06 00:16:11,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-05-06 00:16:11,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2021-05-06 00:16:11,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 89 states have (on average 1.0112359550561798) internal successors, (90), 89 states have internal predecessors, (90), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:16:11,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2021-05-06 00:16:11,054 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 91 [2021-05-06 00:16:11,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:16:11,054 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2021-05-06 00:16:11,054 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 84 states, 84 states have (on average 1.0476190476190477) internal successors, (88), 84 states have internal predecessors, (88), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:16:11,054 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2021-05-06 00:16:11,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-06 00:16:11,054 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:16:11,054 INFO L523 BasicCegarLoop]: trace histogram [76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:16:11,259 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:16:11,259 INFO L428 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:16:11,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:16:11,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1924403233, now seen corresponding path program 76 times [2021-05-06 00:16:11,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:16:11,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646290910] [2021-05-06 00:16:11,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:16:11,269 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:16:11,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1371470926] [2021-05-06 00:16:11,269 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:16:11,413 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 00:16:11,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:16:11,529 WARN L261 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 332 conjunts are in the unsatisfiable core [2021-05-06 00:16:11,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:16:14,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:16:14,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:16:14,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:16:14,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:16:14,654 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:16:14,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:16:14,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646290910] [2021-05-06 00:16:14,654 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:16:14,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371470926] [2021-05-06 00:16:14,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371470926] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:16:14,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:16:14,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85] total 85 [2021-05-06 00:16:14,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371942994] [2021-05-06 00:16:14,655 INFO L460 AbstractCegarLoop]: Interpolant automaton has 85 states [2021-05-06 00:16:14,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:16:14,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-05-06 00:16:14,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=6973, Unknown=0, NotChecked=0, Total=7140 [2021-05-06 00:16:14,655 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand has 85 states, 85 states have (on average 1.0470588235294118) internal successors, (89), 85 states have internal predecessors, (89), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:16:31,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:16:31,882 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2021-05-06 00:16:31,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-05-06 00:16:31,883 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.0470588235294118) internal successors, (89), 85 states have internal predecessors, (89), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 92 [2021-05-06 00:16:31,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:16:31,883 INFO L225 Difference]: With dead ends: 97 [2021-05-06 00:16:31,883 INFO L226 Difference]: Without dead ends: 94 [2021-05-06 00:16:31,883 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3031.8ms TimeCoverageRelationStatistics Valid=171, Invalid=7139, Unknown=0, NotChecked=0, Total=7310 [2021-05-06 00:16:31,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-05-06 00:16:31,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2021-05-06 00:16:31,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 90 states have (on average 1.011111111111111) internal successors, (91), 90 states have internal predecessors, (91), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:16:31,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2021-05-06 00:16:31,888 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 92 [2021-05-06 00:16:31,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:16:31,888 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2021-05-06 00:16:31,888 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 85 states, 85 states have (on average 1.0470588235294118) internal successors, (89), 85 states have internal predecessors, (89), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:16:31,888 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2021-05-06 00:16:31,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-05-06 00:16:31,888 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:16:31,888 INFO L523 BasicCegarLoop]: trace histogram [77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:16:32,089 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2021-05-06 00:16:32,089 INFO L428 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:16:32,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:16:32,089 INFO L82 PathProgramCache]: Analyzing trace with hash -473104374, now seen corresponding path program 77 times [2021-05-06 00:16:32,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:16:32,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755980623] [2021-05-06 00:16:32,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:16:32,095 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:16:32,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2020819530] [2021-05-06 00:16:32,096 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:16:32,234 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2021-05-06 00:16:32,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:16:32,241 WARN L261 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 336 conjunts are in the unsatisfiable core [2021-05-06 00:16:32,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:16:35,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:16:35,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:16:35,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:16:35,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:16:35,499 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:16:35,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:16:35,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755980623] [2021-05-06 00:16:35,499 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:16:35,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020819530] [2021-05-06 00:16:35,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020819530] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:16:35,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:16:35,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86] total 86 [2021-05-06 00:16:35,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913289064] [2021-05-06 00:16:35,500 INFO L460 AbstractCegarLoop]: Interpolant automaton has 86 states [2021-05-06 00:16:35,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:16:35,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-05-06 00:16:35,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=7141, Unknown=0, NotChecked=0, Total=7310 [2021-05-06 00:16:35,500 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand has 86 states, 86 states have (on average 1.0465116279069768) internal successors, (90), 86 states have internal predecessors, (90), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:16:50,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:16:50,721 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2021-05-06 00:16:50,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-05-06 00:16:50,721 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 1.0465116279069768) internal successors, (90), 86 states have internal predecessors, (90), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2021-05-06 00:16:50,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:16:50,721 INFO L225 Difference]: With dead ends: 98 [2021-05-06 00:16:50,722 INFO L226 Difference]: Without dead ends: 95 [2021-05-06 00:16:50,722 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3157.7ms TimeCoverageRelationStatistics Valid=173, Invalid=7309, Unknown=0, NotChecked=0, Total=7482 [2021-05-06 00:16:50,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-05-06 00:16:50,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2021-05-06 00:16:50,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 91 states have (on average 1.010989010989011) internal successors, (92), 91 states have internal predecessors, (92), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:16:50,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2021-05-06 00:16:50,726 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 93 [2021-05-06 00:16:50,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:16:50,726 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2021-05-06 00:16:50,727 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 86 states, 86 states have (on average 1.0465116279069768) internal successors, (90), 86 states have internal predecessors, (90), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:16:50,727 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2021-05-06 00:16:50,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-05-06 00:16:50,727 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:16:50,727 INFO L523 BasicCegarLoop]: trace histogram [78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:16:50,936 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:16:50,937 INFO L428 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:16:50,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:16:50,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1781396159, now seen corresponding path program 78 times [2021-05-06 00:16:50,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:16:50,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527488709] [2021-05-06 00:16:50,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:16:50,943 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:16:50,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [373266458] [2021-05-06 00:16:50,943 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:16:51,098 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2021-05-06 00:16:51,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:16:51,109 WARN L261 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 340 conjunts are in the unsatisfiable core [2021-05-06 00:16:51,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:16:54,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:16:54,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:16:54,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:16:54,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:16:54,265 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:16:54,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:16:54,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527488709] [2021-05-06 00:16:54,266 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:16:54,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373266458] [2021-05-06 00:16:54,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373266458] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:16:54,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:16:54,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87] total 87 [2021-05-06 00:16:54,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308934916] [2021-05-06 00:16:54,266 INFO L460 AbstractCegarLoop]: Interpolant automaton has 87 states [2021-05-06 00:16:54,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:16:54,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-05-06 00:16:54,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=7311, Unknown=0, NotChecked=0, Total=7482 [2021-05-06 00:16:54,267 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand has 87 states, 87 states have (on average 1.0459770114942528) internal successors, (91), 87 states have internal predecessors, (91), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:17:09,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:17:09,691 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2021-05-06 00:17:09,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-05-06 00:17:09,691 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 1.0459770114942528) internal successors, (91), 87 states have internal predecessors, (91), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 94 [2021-05-06 00:17:09,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:17:09,692 INFO L225 Difference]: With dead ends: 99 [2021-05-06 00:17:09,692 INFO L226 Difference]: Without dead ends: 96 [2021-05-06 00:17:09,692 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3070.7ms TimeCoverageRelationStatistics Valid=175, Invalid=7481, Unknown=0, NotChecked=0, Total=7656 [2021-05-06 00:17:09,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-05-06 00:17:09,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2021-05-06 00:17:09,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 92 states have (on average 1.0108695652173914) internal successors, (93), 92 states have internal predecessors, (93), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:17:09,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2021-05-06 00:17:09,697 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 94 [2021-05-06 00:17:09,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:17:09,697 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2021-05-06 00:17:09,697 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 87 states, 87 states have (on average 1.0459770114942528) internal successors, (91), 87 states have internal predecessors, (91), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:17:09,697 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2021-05-06 00:17:09,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-05-06 00:17:09,697 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:17:09,697 INFO L523 BasicCegarLoop]: trace histogram [79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:17:09,911 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable234,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:17:09,911 INFO L428 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:17:09,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:17:09,912 INFO L82 PathProgramCache]: Analyzing trace with hash 611231466, now seen corresponding path program 79 times [2021-05-06 00:17:09,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:17:09,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015835069] [2021-05-06 00:17:09,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:17:09,918 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:17:09,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [824605046] [2021-05-06 00:17:09,918 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:17:10,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 00:17:10,013 WARN L261 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 344 conjunts are in the unsatisfiable core [2021-05-06 00:17:10,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:17:13,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:17:13,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:17:13,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:17:13,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:17:13,579 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:17:13,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:17:13,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015835069] [2021-05-06 00:17:13,579 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:17:13,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824605046] [2021-05-06 00:17:13,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824605046] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:17:13,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:17:13,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88] total 88 [2021-05-06 00:17:13,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873523992] [2021-05-06 00:17:13,580 INFO L460 AbstractCegarLoop]: Interpolant automaton has 88 states [2021-05-06 00:17:13,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:17:13,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2021-05-06 00:17:13,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=7483, Unknown=0, NotChecked=0, Total=7656 [2021-05-06 00:17:13,580 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand has 88 states, 88 states have (on average 1.0454545454545454) internal successors, (92), 88 states have internal predecessors, (92), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:17:37,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:17:37,208 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2021-05-06 00:17:37,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-05-06 00:17:37,208 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 1.0454545454545454) internal successors, (92), 88 states have internal predecessors, (92), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 95 [2021-05-06 00:17:37,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:17:37,208 INFO L225 Difference]: With dead ends: 100 [2021-05-06 00:17:37,208 INFO L226 Difference]: Without dead ends: 97 [2021-05-06 00:17:37,209 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3475.7ms TimeCoverageRelationStatistics Valid=177, Invalid=7655, Unknown=0, NotChecked=0, Total=7832 [2021-05-06 00:17:37,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-05-06 00:17:37,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2021-05-06 00:17:37,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 93 states have (on average 1.010752688172043) internal successors, (94), 93 states have internal predecessors, (94), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:17:37,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2021-05-06 00:17:37,213 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 95 [2021-05-06 00:17:37,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:17:37,213 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2021-05-06 00:17:37,214 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 88 states, 88 states have (on average 1.0454545454545454) internal successors, (92), 88 states have internal predecessors, (92), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:17:37,214 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2021-05-06 00:17:37,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-05-06 00:17:37,214 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:17:37,214 INFO L523 BasicCegarLoop]: trace histogram [80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:17:37,414 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2021-05-06 00:17:37,414 INFO L428 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:17:37,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:17:37,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1768243809, now seen corresponding path program 80 times [2021-05-06 00:17:37,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:17:37,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219453137] [2021-05-06 00:17:37,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:17:37,421 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:17:37,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1446173462] [2021-05-06 00:17:37,421 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:17:37,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 00:17:37,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:17:37,530 WARN L261 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 348 conjunts are in the unsatisfiable core [2021-05-06 00:17:37,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:17:41,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:17:41,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:17:41,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:17:41,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:17:41,123 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:17:41,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:17:41,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219453137] [2021-05-06 00:17:41,124 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:17:41,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446173462] [2021-05-06 00:17:41,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446173462] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:17:41,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:17:41,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89] total 89 [2021-05-06 00:17:41,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820897073] [2021-05-06 00:17:41,124 INFO L460 AbstractCegarLoop]: Interpolant automaton has 89 states [2021-05-06 00:17:41,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:17:41,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2021-05-06 00:17:41,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=7657, Unknown=0, NotChecked=0, Total=7832 [2021-05-06 00:17:41,125 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand has 89 states, 89 states have (on average 1.0449438202247192) internal successors, (93), 89 states have internal predecessors, (93), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:18:09,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:18:09,502 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2021-05-06 00:18:09,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-05-06 00:18:09,503 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 1.0449438202247192) internal successors, (93), 89 states have internal predecessors, (93), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 96 [2021-05-06 00:18:09,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:18:09,503 INFO L225 Difference]: With dead ends: 101 [2021-05-06 00:18:09,503 INFO L226 Difference]: Without dead ends: 98 [2021-05-06 00:18:09,504 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3489.9ms TimeCoverageRelationStatistics Valid=179, Invalid=7831, Unknown=0, NotChecked=0, Total=8010 [2021-05-06 00:18:09,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-05-06 00:18:09,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2021-05-06 00:18:09,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 94 states have (on average 1.0106382978723405) internal successors, (95), 94 states have internal predecessors, (95), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:18:09,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2021-05-06 00:18:09,510 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 96 [2021-05-06 00:18:09,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:18:09,511 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2021-05-06 00:18:09,511 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 89 states, 89 states have (on average 1.0449438202247192) internal successors, (93), 89 states have internal predecessors, (93), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:18:09,511 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2021-05-06 00:18:09,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-05-06 00:18:09,511 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:18:09,511 INFO L523 BasicCegarLoop]: trace histogram [81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:18:09,712 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:18:09,712 INFO L428 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:18:09,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:18:09,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1019079222, now seen corresponding path program 81 times [2021-05-06 00:18:09,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:18:09,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358561464] [2021-05-06 00:18:09,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:18:09,719 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:18:09,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [886086] [2021-05-06 00:18:09,719 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:18:09,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2021-05-06 00:18:09,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:18:09,869 WARN L261 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 352 conjunts are in the unsatisfiable core [2021-05-06 00:18:09,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:18:13,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:18:13,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:18:13,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:18:13,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:18:13,263 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:18:13,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:18:13,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358561464] [2021-05-06 00:18:13,263 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:18:13,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886086] [2021-05-06 00:18:13,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886086] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:18:13,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:18:13,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90] total 90 [2021-05-06 00:18:13,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754735968] [2021-05-06 00:18:13,264 INFO L460 AbstractCegarLoop]: Interpolant automaton has 90 states [2021-05-06 00:18:13,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:18:13,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-05-06 00:18:13,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=7833, Unknown=0, NotChecked=0, Total=8010 [2021-05-06 00:18:13,264 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand has 90 states, 90 states have (on average 1.0444444444444445) internal successors, (94), 90 states have internal predecessors, (94), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:18:41,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:18:41,111 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2021-05-06 00:18:41,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-05-06 00:18:41,112 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 1.0444444444444445) internal successors, (94), 90 states have internal predecessors, (94), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 97 [2021-05-06 00:18:41,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:18:41,112 INFO L225 Difference]: With dead ends: 102 [2021-05-06 00:18:41,112 INFO L226 Difference]: Without dead ends: 99 [2021-05-06 00:18:41,112 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3286.5ms TimeCoverageRelationStatistics Valid=181, Invalid=8009, Unknown=0, NotChecked=0, Total=8190 [2021-05-06 00:18:41,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-05-06 00:18:41,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2021-05-06 00:18:41,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 95 states have (on average 1.0105263157894737) internal successors, (96), 95 states have internal predecessors, (96), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:18:41,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2021-05-06 00:18:41,117 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 97 [2021-05-06 00:18:41,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:18:41,117 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2021-05-06 00:18:41,117 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 90 states, 90 states have (on average 1.0444444444444445) internal successors, (94), 90 states have internal predecessors, (94), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:18:41,117 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2021-05-06 00:18:41,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-05-06 00:18:41,118 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:18:41,118 INFO L523 BasicCegarLoop]: trace histogram [82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:18:41,318 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2021-05-06 00:18:41,318 INFO L428 AbstractCegarLoop]: === Iteration 83 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:18:41,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:18:41,318 INFO L82 PathProgramCache]: Analyzing trace with hash -1526747263, now seen corresponding path program 82 times [2021-05-06 00:18:41,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:18:41,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985510325] [2021-05-06 00:18:41,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:18:41,325 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:18:41,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1361214190] [2021-05-06 00:18:41,325 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:18:41,428 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 00:18:41,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:18:41,433 WARN L261 TraceCheckSpWp]: Trace formula consists of 540 conjuncts, 356 conjunts are in the unsatisfiable core [2021-05-06 00:18:41,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:18:45,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:18:45,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:18:45,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:18:45,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:18:45,549 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:18:45,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:18:45,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985510325] [2021-05-06 00:18:45,550 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:18:45,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361214190] [2021-05-06 00:18:45,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361214190] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:18:45,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:18:45,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91] total 91 [2021-05-06 00:18:45,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422099971] [2021-05-06 00:18:45,550 INFO L460 AbstractCegarLoop]: Interpolant automaton has 91 states [2021-05-06 00:18:45,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:18:45,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2021-05-06 00:18:45,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=8011, Unknown=0, NotChecked=0, Total=8190 [2021-05-06 00:18:45,551 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand has 91 states, 91 states have (on average 1.043956043956044) internal successors, (95), 91 states have internal predecessors, (95), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:19:18,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:19:18,210 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2021-05-06 00:19:18,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-05-06 00:19:18,211 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 1.043956043956044) internal successors, (95), 91 states have internal predecessors, (95), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 98 [2021-05-06 00:19:18,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:19:18,211 INFO L225 Difference]: With dead ends: 103 [2021-05-06 00:19:18,211 INFO L226 Difference]: Without dead ends: 100 [2021-05-06 00:19:18,212 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4001.3ms TimeCoverageRelationStatistics Valid=183, Invalid=8189, Unknown=0, NotChecked=0, Total=8372 [2021-05-06 00:19:18,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-05-06 00:19:18,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2021-05-06 00:19:18,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 96 states have (on average 1.0104166666666667) internal successors, (97), 96 states have internal predecessors, (97), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:19:18,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2021-05-06 00:19:18,216 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 98 [2021-05-06 00:19:18,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:19:18,216 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2021-05-06 00:19:18,216 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 91 states, 91 states have (on average 1.043956043956044) internal successors, (95), 91 states have internal predecessors, (95), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:19:18,216 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2021-05-06 00:19:18,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-05-06 00:19:18,217 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:19:18,217 INFO L523 BasicCegarLoop]: trace histogram [83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:19:18,417 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2021-05-06 00:19:18,417 INFO L428 AbstractCegarLoop]: === Iteration 84 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:19:18,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:19:18,418 INFO L82 PathProgramCache]: Analyzing trace with hash -84587350, now seen corresponding path program 83 times [2021-05-06 00:19:18,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:19:18,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527771095] [2021-05-06 00:19:18,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:19:18,424 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:19:18,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [652256007] [2021-05-06 00:19:18,424 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:19:18,581 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2021-05-06 00:19:18,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:19:18,591 WARN L261 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 360 conjunts are in the unsatisfiable core [2021-05-06 00:19:18,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:19:22,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:19:22,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:19:22,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:19:22,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:19:22,319 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:19:22,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:19:22,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527771095] [2021-05-06 00:19:22,320 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:19:22,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652256007] [2021-05-06 00:19:22,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652256007] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:19:22,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:19:22,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [92] total 92 [2021-05-06 00:19:22,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156739925] [2021-05-06 00:19:22,320 INFO L460 AbstractCegarLoop]: Interpolant automaton has 92 states [2021-05-06 00:19:22,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:19:22,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2021-05-06 00:19:22,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=8191, Unknown=0, NotChecked=0, Total=8372 [2021-05-06 00:19:22,321 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand has 92 states, 92 states have (on average 1.0434782608695652) internal successors, (96), 92 states have internal predecessors, (96), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:20:04,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:20:04,418 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2021-05-06 00:20:04,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-05-06 00:20:04,418 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 1.0434782608695652) internal successors, (96), 92 states have internal predecessors, (96), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 99 [2021-05-06 00:20:04,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:20:04,419 INFO L225 Difference]: With dead ends: 104 [2021-05-06 00:20:04,419 INFO L226 Difference]: Without dead ends: 101 [2021-05-06 00:20:04,419 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3619.2ms TimeCoverageRelationStatistics Valid=185, Invalid=8371, Unknown=0, NotChecked=0, Total=8556 [2021-05-06 00:20:04,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-05-06 00:20:04,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2021-05-06 00:20:04,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 97 states have (on average 1.0103092783505154) internal successors, (98), 97 states have internal predecessors, (98), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:20:04,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2021-05-06 00:20:04,424 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 99 [2021-05-06 00:20:04,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:20:04,424 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2021-05-06 00:20:04,424 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 92 states, 92 states have (on average 1.0434782608695652) internal successors, (96), 92 states have internal predecessors, (96), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:20:04,424 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2021-05-06 00:20:04,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-05-06 00:20:04,425 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:20:04,425 INFO L523 BasicCegarLoop]: trace histogram [84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:20:04,625 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2021-05-06 00:20:04,625 INFO L428 AbstractCegarLoop]: === Iteration 85 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:20:04,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:20:04,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1672696993, now seen corresponding path program 84 times [2021-05-06 00:20:04,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:20:04,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907777946] [2021-05-06 00:20:04,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:20:04,632 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:20:04,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [989945808] [2021-05-06 00:20:04,632 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:20:04,785 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2021-05-06 00:20:04,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:20:04,801 WARN L261 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 365 conjunts are in the unsatisfiable core [2021-05-06 00:20:04,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:20:08,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:20:08,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:20:08,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:20:08,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:20:08,990 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:20:08,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:20:08,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907777946] [2021-05-06 00:20:08,991 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:20:08,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989945808] [2021-05-06 00:20:08,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989945808] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:20:08,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:20:08,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [94] total 94 [2021-05-06 00:20:08,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892961105] [2021-05-06 00:20:08,991 INFO L460 AbstractCegarLoop]: Interpolant automaton has 94 states [2021-05-06 00:20:08,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:20:08,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-05-06 00:20:08,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=8467, Unknown=0, NotChecked=0, Total=8742 [2021-05-06 00:20:08,992 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand has 94 states, 94 states have (on average 1.0319148936170213) internal successors, (97), 94 states have internal predecessors, (97), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:20:57,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:20:57,776 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2021-05-06 00:20:57,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-05-06 00:20:57,776 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 1.0319148936170213) internal successors, (97), 94 states have internal predecessors, (97), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 100 [2021-05-06 00:20:57,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:20:57,777 INFO L225 Difference]: With dead ends: 105 [2021-05-06 00:20:57,777 INFO L226 Difference]: Without dead ends: 102 [2021-05-06 00:20:57,777 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 4074.0ms TimeCoverageRelationStatistics Valid=280, Invalid=8650, Unknown=0, NotChecked=0, Total=8930 [2021-05-06 00:20:57,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-05-06 00:20:57,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2021-05-06 00:20:57,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 98 states have (on average 1.010204081632653) internal successors, (99), 98 states have internal predecessors, (99), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:20:57,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2021-05-06 00:20:57,782 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 100 [2021-05-06 00:20:57,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:20:57,782 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2021-05-06 00:20:57,782 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 94 states, 94 states have (on average 1.0319148936170213) internal successors, (97), 94 states have internal predecessors, (97), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:20:57,782 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2021-05-06 00:20:57,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-05-06 00:20:57,782 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:20:57,783 INFO L523 BasicCegarLoop]: trace histogram [85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:20:57,983 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:20:57,985 INFO L428 AbstractCegarLoop]: === Iteration 86 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:20:57,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:20:57,985 INFO L82 PathProgramCache]: Analyzing trace with hash 313936778, now seen corresponding path program 85 times [2021-05-06 00:20:57,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:20:57,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672834476] [2021-05-06 00:20:57,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:20:57,992 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:20:57,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1558992323] [2021-05-06 00:20:57,992 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:20:58,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 00:20:58,088 WARN L261 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 368 conjunts are in the unsatisfiable core [2021-05-06 00:20:58,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:21:01,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:21:01,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:21:01,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:21:01,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:21:01,754 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:21:01,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:21:01,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672834476] [2021-05-06 00:21:01,755 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:21:01,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558992323] [2021-05-06 00:21:01,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558992323] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:21:01,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:21:01,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [94] total 94 [2021-05-06 00:21:01,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052624117] [2021-05-06 00:21:01,755 INFO L460 AbstractCegarLoop]: Interpolant automaton has 94 states [2021-05-06 00:21:01,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:21:01,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-05-06 00:21:01,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=8557, Unknown=0, NotChecked=0, Total=8742 [2021-05-06 00:21:01,756 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand has 94 states, 94 states have (on average 1.0425531914893618) internal successors, (98), 94 states have internal predecessors, (98), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:21:42,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:21:42,249 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2021-05-06 00:21:42,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-05-06 00:21:42,249 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 1.0425531914893618) internal successors, (98), 94 states have internal predecessors, (98), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 101 [2021-05-06 00:21:42,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:21:42,250 INFO L225 Difference]: With dead ends: 106 [2021-05-06 00:21:42,250 INFO L226 Difference]: Without dead ends: 103 [2021-05-06 00:21:42,250 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3556.5ms TimeCoverageRelationStatistics Valid=189, Invalid=8741, Unknown=0, NotChecked=0, Total=8930 [2021-05-06 00:21:42,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-05-06 00:21:42,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2021-05-06 00:21:42,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 99 states have (on average 1.0101010101010102) internal successors, (100), 99 states have internal predecessors, (100), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:21:42,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2021-05-06 00:21:42,256 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 101 [2021-05-06 00:21:42,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:21:42,256 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2021-05-06 00:21:42,256 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 94 states, 94 states have (on average 1.0425531914893618) internal successors, (98), 94 states have internal predecessors, (98), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:21:42,256 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2021-05-06 00:21:42,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-06 00:21:42,256 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:21:42,256 INFO L523 BasicCegarLoop]: trace histogram [86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:21:42,457 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2021-05-06 00:21:42,457 INFO L428 AbstractCegarLoop]: === Iteration 87 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:21:42,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:21:42,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1142043073, now seen corresponding path program 86 times [2021-05-06 00:21:42,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:21:42,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795785969] [2021-05-06 00:21:42,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:21:42,464 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:21:42,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [763328258] [2021-05-06 00:21:42,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:21:42,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 00:21:42,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:21:42,578 WARN L261 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 372 conjunts are in the unsatisfiable core [2021-05-06 00:21:42,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:21:46,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:21:46,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:21:46,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:21:46,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:21:46,374 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:21:46,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:21:46,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795785969] [2021-05-06 00:21:46,374 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:21:46,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763328258] [2021-05-06 00:21:46,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763328258] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:21:46,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:21:46,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95] total 95 [2021-05-06 00:21:46,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297698384] [2021-05-06 00:21:46,375 INFO L460 AbstractCegarLoop]: Interpolant automaton has 95 states [2021-05-06 00:21:46,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:21:46,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2021-05-06 00:21:46,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=8743, Unknown=0, NotChecked=0, Total=8930 [2021-05-06 00:21:46,375 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand has 95 states, 95 states have (on average 1.0421052631578946) internal successors, (99), 95 states have internal predecessors, (99), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:22:40,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:22:40,857 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2021-05-06 00:22:40,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-05-06 00:22:40,858 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 1.0421052631578946) internal successors, (99), 95 states have internal predecessors, (99), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2021-05-06 00:22:40,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:22:40,858 INFO L225 Difference]: With dead ends: 107 [2021-05-06 00:22:40,858 INFO L226 Difference]: Without dead ends: 104 [2021-05-06 00:22:40,859 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3669.5ms TimeCoverageRelationStatistics Valid=191, Invalid=8929, Unknown=0, NotChecked=0, Total=9120 [2021-05-06 00:22:40,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-05-06 00:22:40,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2021-05-06 00:22:40,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 100 states have (on average 1.01) internal successors, (101), 100 states have internal predecessors, (101), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:22:40,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2021-05-06 00:22:40,864 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 102 [2021-05-06 00:22:40,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:22:40,864 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2021-05-06 00:22:40,864 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 95 states, 95 states have (on average 1.0421052631578946) internal successors, (99), 95 states have internal predecessors, (99), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:22:40,864 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2021-05-06 00:22:40,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-05-06 00:22:40,864 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:22:40,865 INFO L523 BasicCegarLoop]: trace histogram [87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:22:41,080 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable258 [2021-05-06 00:22:41,081 INFO L428 AbstractCegarLoop]: === Iteration 88 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:22:41,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:22:41,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1043534442, now seen corresponding path program 87 times [2021-05-06 00:22:41,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:22:41,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396579678] [2021-05-06 00:22:41,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:22:41,088 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:22:41,088 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [464829374] [2021-05-06 00:22:41,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:22:41,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2021-05-06 00:22:41,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:22:41,287 WARN L261 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 376 conjunts are in the unsatisfiable core [2021-05-06 00:22:41,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:22:44,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:22:44,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:22:44,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:22:44,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:22:45,076 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:22:45,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:22:45,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396579678] [2021-05-06 00:22:45,076 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:22:45,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464829374] [2021-05-06 00:22:45,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464829374] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:22:45,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:22:45,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96] total 96 [2021-05-06 00:22:45,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530403676] [2021-05-06 00:22:45,077 INFO L460 AbstractCegarLoop]: Interpolant automaton has 96 states [2021-05-06 00:22:45,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:22:45,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-05-06 00:22:45,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=8931, Unknown=0, NotChecked=0, Total=9120 [2021-05-06 00:22:45,077 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand has 96 states, 96 states have (on average 1.0416666666666667) internal successors, (100), 96 states have internal predecessors, (100), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:23:35,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:23:35,486 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2021-05-06 00:23:35,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-05-06 00:23:35,486 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 1.0416666666666667) internal successors, (100), 96 states have internal predecessors, (100), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 103 [2021-05-06 00:23:35,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:23:35,487 INFO L225 Difference]: With dead ends: 108 [2021-05-06 00:23:35,487 INFO L226 Difference]: Without dead ends: 105 [2021-05-06 00:23:35,487 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3681.2ms TimeCoverageRelationStatistics Valid=193, Invalid=9119, Unknown=0, NotChecked=0, Total=9312 [2021-05-06 00:23:35,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-05-06 00:23:35,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2021-05-06 00:23:35,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 101 states have (on average 1.00990099009901) internal successors, (102), 101 states have internal predecessors, (102), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:23:35,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2021-05-06 00:23:35,493 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 103 [2021-05-06 00:23:35,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:23:35,493 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2021-05-06 00:23:35,493 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 96 states, 96 states have (on average 1.0416666666666667) internal successors, (100), 96 states have internal predecessors, (100), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:23:35,493 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2021-05-06 00:23:35,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-06 00:23:35,493 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:23:35,493 INFO L523 BasicCegarLoop]: trace histogram [88, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:23:35,700 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:23:35,700 INFO L428 AbstractCegarLoop]: === Iteration 89 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:23:35,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:23:35,701 INFO L82 PathProgramCache]: Analyzing trace with hash -2010233119, now seen corresponding path program 88 times [2021-05-06 00:23:35,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:23:35,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360436498] [2021-05-06 00:23:35,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:23:35,708 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:23:35,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [880323631] [2021-05-06 00:23:35,708 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:23:35,817 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 00:23:35,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:23:35,821 WARN L261 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 380 conjunts are in the unsatisfiable core [2021-05-06 00:23:35,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:23:40,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:23:40,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:23:40,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:23:40,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:23:40,406 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:23:40,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:23:40,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360436498] [2021-05-06 00:23:40,406 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:23:40,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880323631] [2021-05-06 00:23:40,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880323631] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:23:40,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:23:40,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97] total 97 [2021-05-06 00:23:40,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957684599] [2021-05-06 00:23:40,407 INFO L460 AbstractCegarLoop]: Interpolant automaton has 97 states [2021-05-06 00:23:40,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:23:40,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-05-06 00:23:40,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=9121, Unknown=0, NotChecked=0, Total=9312 [2021-05-06 00:23:40,407 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand has 97 states, 97 states have (on average 1.041237113402062) internal successors, (101), 97 states have internal predecessors, (101), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:24:51,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 00:24:51,213 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2021-05-06 00:24:51,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-05-06 00:24:51,213 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.041237113402062) internal successors, (101), 97 states have internal predecessors, (101), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 104 [2021-05-06 00:24:51,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 00:24:51,214 INFO L225 Difference]: With dead ends: 109 [2021-05-06 00:24:51,214 INFO L226 Difference]: Without dead ends: 106 [2021-05-06 00:24:51,214 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4479.6ms TimeCoverageRelationStatistics Valid=195, Invalid=9311, Unknown=0, NotChecked=0, Total=9506 [2021-05-06 00:24:51,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-05-06 00:24:51,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2021-05-06 00:24:51,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 102 states have (on average 1.0098039215686274) internal successors, (103), 102 states have internal predecessors, (103), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:24:51,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2021-05-06 00:24:51,220 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 104 [2021-05-06 00:24:51,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 00:24:51,220 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2021-05-06 00:24:51,220 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 97 states, 97 states have (on average 1.041237113402062) internal successors, (101), 97 states have internal predecessors, (101), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 00:24:51,220 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2021-05-06 00:24:51,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-06 00:24:51,220 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 00:24:51,220 INFO L523 BasicCegarLoop]: trace histogram [89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 00:24:51,428 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:24:51,429 INFO L428 AbstractCegarLoop]: === Iteration 90 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 00:24:51,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 00:24:51,429 INFO L82 PathProgramCache]: Analyzing trace with hash 2107220298, now seen corresponding path program 89 times [2021-05-06 00:24:51,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 00:24:51,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003091137] [2021-05-06 00:24:51,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 00:24:51,435 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 00:24:51,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2131800732] [2021-05-06 00:24:51,436 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 00:24:51,600 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2021-05-06 00:24:51,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 00:24:51,610 WARN L261 TraceCheckSpWp]: Trace formula consists of 575 conjuncts, 384 conjunts are in the unsatisfiable core [2021-05-06 00:24:51,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 00:24:55,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:24:55,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:24:55,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:24:55,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 00:24:56,069 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 00:24:56,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 00:24:56,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003091137] [2021-05-06 00:24:56,070 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 00:24:56,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131800732] [2021-05-06 00:24:56,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131800732] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 00:24:56,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 00:24:56,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98] total 98 [2021-05-06 00:24:56,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146181669] [2021-05-06 00:24:56,070 INFO L460 AbstractCegarLoop]: Interpolant automaton has 98 states [2021-05-06 00:24:56,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 00:24:56,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2021-05-06 00:24:56,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=9313, Unknown=0, NotChecked=0, Total=9506 [2021-05-06 00:24:56,071 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand has 98 states, 98 states have (on average 1.0408163265306123) internal successors, (102), 98 states have internal predecessors, (102), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)