/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_unwindbound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 04:22:12,378 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 04:22:12,381 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 04:22:12,441 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 04:22:12,482 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 04:22:12,483 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 04:22:12,485 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 04:22:12,486 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 04:22:12,488 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 04:22:12,489 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 04:22:12,491 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 04:22:12,496 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 04:22:12,497 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 04:22:12,498 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 04:22:12,499 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 04:22:12,501 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 04:22:12,506 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 04:22:12,529 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 04:22:12,530 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 04:22:12,530 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 04:22:12,531 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-06 04:22:12,586 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 04:22:12,586 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 04:22:12,589 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 04:22:12,589 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 04:22:12,589 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 04:22:12,589 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 04:22:12,589 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 04:22:12,589 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 04:22:12,589 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 04:22:12,590 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 04:22:12,590 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 04:22:12,591 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 04:22:12,591 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 04:22:12,591 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 04:22:12,591 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 04:22:12,591 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 04:22:12,591 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 04:22:12,591 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 04:22:12,592 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 04:22:12,592 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 04:22:12,592 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 04:22:12,609 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 04:22:12,610 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 04:22:12,610 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 04:22:12,610 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 04:22:12,610 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 04:22:12,610 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 04:22:12,610 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 04:22:12,610 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 04:22:13,179 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 04:22:13,209 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 04:22:13,214 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 04:22:13,215 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 04:22:13,229 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 04:22:13,230 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_unwindbound10.c [2021-05-06 04:22:13,320 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/600838a72/cc36dae7900b43c7b3bbd6f6726a9749/FLAG869c6be97 [2021-05-06 04:22:13,989 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 04:22:13,990 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_unwindbound10.c [2021-05-06 04:22:14,005 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/600838a72/cc36dae7900b43c7b3bbd6f6726a9749/FLAG869c6be97 [2021-05-06 04:22:14,027 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/600838a72/cc36dae7900b43c7b3bbd6f6726a9749 [2021-05-06 04:22:14,030 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 04:22:14,032 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 04:22:14,057 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 04:22:14,057 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 04:22:14,060 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 04:22:14,061 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 04:22:14" (1/1) ... [2021-05-06 04:22:14,062 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b86f0b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:22:14, skipping insertion in model container [2021-05-06 04:22:14,062 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 04:22:14" (1/1) ... [2021-05-06 04:22:14,068 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 04:22:14,089 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 04:22:14,355 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_unwindbound10.c[537,550] [2021-05-06 04:22:14,390 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 04:22:14,397 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 04:22:14,475 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_unwindbound10.c[537,550] [2021-05-06 04:22:14,504 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 04:22:14,519 INFO L208 MainTranslator]: Completed translation [2021-05-06 04:22:14,519 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:22:14 WrapperNode [2021-05-06 04:22:14,519 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 04:22:14,522 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 04:22:14,522 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 04:22:14,523 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 04:22:14,532 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:22:14" (1/1) ... [2021-05-06 04:22:14,533 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:22:14" (1/1) ... [2021-05-06 04:22:14,539 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:22:14" (1/1) ... [2021-05-06 04:22:14,539 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:22:14" (1/1) ... [2021-05-06 04:22:14,550 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:22:14" (1/1) ... [2021-05-06 04:22:14,555 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:22:14" (1/1) ... [2021-05-06 04:22:14,559 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:22:14" (1/1) ... [2021-05-06 04:22:14,561 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 04:22:14,562 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 04:22:14,562 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 04:22:14,562 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 04:22:14,563 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:22:14" (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 04:22:14,634 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 04:22:14,635 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 04:22:14,635 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 04:22:14,635 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 04:22:14,635 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 04:22:14,636 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 04:22:14,636 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 04:22:14,636 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 04:22:14,636 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 04:22:14,636 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 04:22:14,636 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 04:22:14,637 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 04:22:14,637 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 04:22:14,637 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 04:22:14,638 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 04:22:14,638 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 04:22:14,638 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 04:22:14,638 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 04:22:14,638 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 04:22:14,638 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 04:22:14,946 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 04:22:14,946 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 04:22:14,947 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 04:22:14 BoogieIcfgContainer [2021-05-06 04:22:14,947 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 04:22:14,948 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 04:22:14,948 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 04:22:14,950 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 04:22:14,951 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 04:22:14" (1/3) ... [2021-05-06 04:22:14,951 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d52aff1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 04:22:14, skipping insertion in model container [2021-05-06 04:22:14,951 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:22:14" (2/3) ... [2021-05-06 04:22:14,952 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d52aff1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 04:22:14, skipping insertion in model container [2021-05-06 04:22:14,952 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 04:22:14" (3/3) ... [2021-05-06 04:22:14,954 INFO L111 eAbstractionObserver]: Analyzing ICFG prodbin-ll_unwindbound10.c [2021-05-06 04:22:14,959 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 04:22:14,962 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 04:22:14,979 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 04:22:15,010 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 04:22:15,011 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 04:22:15,011 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 04:22:15,011 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 04:22:15,011 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 04:22:15,011 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 04:22:15,011 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 04:22:15,011 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 04:22:15,030 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 04:22:15,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 04:22:15,035 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:22:15,035 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:22:15,036 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:22:15,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:22:15,044 INFO L82 PathProgramCache]: Analyzing trace with hash -1523633710, now seen corresponding path program 1 times [2021-05-06 04:22:15,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:22:15,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530059788] [2021-05-06 04:22:15,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:22:15,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:22:15,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 04:22:15,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:22:15,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 04:22:15,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:22:15,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 04:22:15,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:22:15,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530059788] [2021-05-06 04:22:15,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530059788] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 04:22:15,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 04:22:15,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 04:22:15,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196160283] [2021-05-06 04:22:15,294 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 04:22:15,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:22:15,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 04:22:15,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 04:22:15,307 INFO L87 Difference]: Start difference. First operand has 30 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 04:22:15,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:22:15,376 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2021-05-06 04:22:15,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 04:22:15,377 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-06 04:22:15,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:22:15,383 INFO L225 Difference]: With dead ends: 52 [2021-05-06 04:22:15,383 INFO L226 Difference]: Without dead ends: 26 [2021-05-06 04:22:15,385 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 45.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 04:22:15,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-06 04:22:15,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-05-06 04:22:15,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 04:22:15,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-05-06 04:22:15,415 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 17 [2021-05-06 04:22:15,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:22:15,415 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-05-06 04:22:15,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 04:22:15,416 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-05-06 04:22:15,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 04:22:15,416 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:22:15,416 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:22:15,417 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 04:22:15,417 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:22:15,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:22:15,418 INFO L82 PathProgramCache]: Analyzing trace with hash -991958694, now seen corresponding path program 1 times [2021-05-06 04:22:15,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:22:15,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552795741] [2021-05-06 04:22:15,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:22:15,433 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:22:15,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [759900031] [2021-05-06 04:22:15,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:22:15,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:22:15,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 04:22:15,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:22:15,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:15,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:15,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:15,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:15,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:15,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 04:22:15,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:22:15,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552795741] [2021-05-06 04:22:15,671 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:22:15,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759900031] [2021-05-06 04:22:15,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759900031] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 04:22:15,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 04:22:15,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 04:22:15,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25854880] [2021-05-06 04:22:15,673 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 04:22:15,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:22:15,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 04:22:15,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 04:22:15,675 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 04:22:15,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:22:15,694 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2021-05-06 04:22:15,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 04:22:15,695 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2021-05-06 04:22:15,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:22:15,697 INFO L225 Difference]: With dead ends: 34 [2021-05-06 04:22:15,697 INFO L226 Difference]: Without dead ends: 27 [2021-05-06 04:22:15,698 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.2ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 04:22:15,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-06 04:22:15,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-06 04:22:15,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 04:22:15,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2021-05-06 04:22:15,714 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 18 [2021-05-06 04:22:15,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:22:15,715 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2021-05-06 04:22:15,715 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 04:22:15,715 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2021-05-06 04:22:15,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 04:22:15,716 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:22:15,721 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:22:15,945 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 04:22:15,945 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:22:15,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:22:15,946 INFO L82 PathProgramCache]: Analyzing trace with hash -990171234, now seen corresponding path program 1 times [2021-05-06 04:22:15,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:22:15,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374220818] [2021-05-06 04:22:15,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:22:15,968 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:22:15,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1818783556] [2021-05-06 04:22:15,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:22:16,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:22:16,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 04:22:16,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:22:16,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:16,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 04:22:16,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:22:16,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374220818] [2021-05-06 04:22:16,141 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:22:16,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818783556] [2021-05-06 04:22:16,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818783556] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 04:22:16,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 04:22:16,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 04:22:16,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060097240] [2021-05-06 04:22:16,142 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 04:22:16,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:22:16,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 04:22:16,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 04:22:16,146 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 04:22:16,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:22:16,200 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2021-05-06 04:22:16,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 04:22:16,200 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-06 04:22:16,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:22:16,201 INFO L225 Difference]: With dead ends: 38 [2021-05-06 04:22:16,201 INFO L226 Difference]: Without dead ends: 36 [2021-05-06 04:22:16,202 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.2ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 04:22:16,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-06 04:22:16,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2021-05-06 04:22:16,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 23 states have internal predecessors, (25), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 04:22:16,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2021-05-06 04:22:16,214 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 18 [2021-05-06 04:22:16,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:22:16,215 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2021-05-06 04:22:16,215 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 04:22:16,215 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2021-05-06 04:22:16,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-06 04:22:16,216 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:22:16,216 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:22:16,436 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:22:16,437 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:22:16,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:22:16,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1094479982, now seen corresponding path program 1 times [2021-05-06 04:22:16,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:22:16,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470465232] [2021-05-06 04:22:16,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:22:16,448 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:22:16,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [979357444] [2021-05-06 04:22:16,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:22:16,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:22:16,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 04:22:16,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:22:16,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:16,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:16,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:16,600 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 04:22:16,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:22:16,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470465232] [2021-05-06 04:22:16,601 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:22:16,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979357444] [2021-05-06 04:22:16,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979357444] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 04:22:16,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 04:22:16,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 04:22:16,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715891789] [2021-05-06 04:22:16,602 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 04:22:16,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:22:16,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 04:22:16,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 04:22:16,603 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 04:22:16,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:22:16,668 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2021-05-06 04:22:16,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 04:22:16,668 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2021-05-06 04:22:16,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:22:16,670 INFO L225 Difference]: With dead ends: 42 [2021-05-06 04:22:16,670 INFO L226 Difference]: Without dead ends: 35 [2021-05-06 04:22:16,673 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 31.0ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-06 04:22:16,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-06 04:22:16,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2021-05-06 04:22:16,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 04:22:16,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2021-05-06 04:22:16,697 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 24 [2021-05-06 04:22:16,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:22:16,698 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2021-05-06 04:22:16,698 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 04:22:16,698 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2021-05-06 04:22:16,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 04:22:16,699 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:22:16,699 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:22:16,924 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:22:16,924 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:22:16,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:22:16,925 INFO L82 PathProgramCache]: Analyzing trace with hash 584619061, now seen corresponding path program 1 times [2021-05-06 04:22:16,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:22:16,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189012252] [2021-05-06 04:22:16,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:22:16,946 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:22:16,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [766219250] [2021-05-06 04:22:16,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:22:17,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:22:17,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 04:22:17,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:22:17,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:17,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:17,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:17,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:17,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:17,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:17,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:17,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:17,114 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 04:22:17,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:22:17,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189012252] [2021-05-06 04:22:17,115 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:22:17,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766219250] [2021-05-06 04:22:17,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766219250] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:22:17,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:22:17,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-06 04:22:17,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001587737] [2021-05-06 04:22:17,116 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 04:22:17,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:22:17,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 04:22:17,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 04:22:17,117 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 04:22:17,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:22:17,175 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2021-05-06 04:22:17,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 04:22:17,175 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-05-06 04:22:17,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:22:17,177 INFO L225 Difference]: With dead ends: 44 [2021-05-06 04:22:17,177 INFO L226 Difference]: Without dead ends: 37 [2021-05-06 04:22:17,178 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 25.7ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 04:22:17,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-05-06 04:22:17,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-05-06 04:22:17,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 27 states have internal predecessors, (31), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 04:22:17,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2021-05-06 04:22:17,189 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 28 [2021-05-06 04:22:17,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:22:17,189 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2021-05-06 04:22:17,189 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 04:22:17,189 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2021-05-06 04:22:17,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 04:22:17,190 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:22:17,190 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:22:17,408 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:22:17,408 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:22:17,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:22:17,409 INFO L82 PathProgramCache]: Analyzing trace with hash 586406521, now seen corresponding path program 1 times [2021-05-06 04:22:17,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:22:17,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232200001] [2021-05-06 04:22:17,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:22:17,435 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:22:17,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [435103369] [2021-05-06 04:22:17,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:22:17,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:22:17,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-06 04:22:17,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:22:17,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:17,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:17,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:17,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:17,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:17,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:17,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:17,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:17,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:17,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:17,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:17,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:17,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:17,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:17,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:17,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:17,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:17,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:17,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:17,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:17,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:17,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:17,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:17,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:17,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:17,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:17,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:17,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:17,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:17,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:17,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:17,831 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 04:22:17,831 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:22:17,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232200001] [2021-05-06 04:22:17,831 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:22:17,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435103369] [2021-05-06 04:22:17,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435103369] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:22:17,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:22:17,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 04:22:17,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905981275] [2021-05-06 04:22:17,832 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 04:22:17,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:22:17,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 04:22:17,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-06 04:22:17,835 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 04:22:17,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:22:17,957 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2021-05-06 04:22:17,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 04:22:17,958 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2021-05-06 04:22:17,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:22:17,960 INFO L225 Difference]: With dead ends: 55 [2021-05-06 04:22:17,960 INFO L226 Difference]: Without dead ends: 48 [2021-05-06 04:22:17,961 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 90.8ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-06 04:22:17,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-06 04:22:17,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2021-05-06 04:22:17,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 34 states have internal predecessors, (38), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 04:22:17,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2021-05-06 04:22:17,983 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 28 [2021-05-06 04:22:17,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:22:17,983 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2021-05-06 04:22:17,983 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 04:22:17,983 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2021-05-06 04:22:17,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 04:22:17,984 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:22:17,985 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:22:18,200 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-06 04:22:18,201 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:22:18,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:22:18,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1395753147, now seen corresponding path program 1 times [2021-05-06 04:22:18,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:22:18,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245543200] [2021-05-06 04:22:18,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:22:18,216 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:22:18,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [725971875] [2021-05-06 04:22:18,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:22:18,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:22:18,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-06 04:22:18,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:22:18,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:18,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:18,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:18,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:18,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:18,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:18,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:18,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:18,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:18,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:18,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:18,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:18,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:18,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:18,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:18,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:18,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:18,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:18,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:18,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:18,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:18,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:18,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:18,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:18,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:18,593 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 04:22:18,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:22:18,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245543200] [2021-05-06 04:22:18,594 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:22:18,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725971875] [2021-05-06 04:22:18,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725971875] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:22:18,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:22:18,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 04:22:18,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755908615] [2021-05-06 04:22:18,594 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 04:22:18,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:22:18,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 04:22:18,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 04:22:18,595 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 04:22:19,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:22:19,165 INFO L93 Difference]: Finished difference Result 57 states and 63 transitions. [2021-05-06 04:22:19,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 04:22:19,166 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2021-05-06 04:22:19,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:22:19,169 INFO L225 Difference]: With dead ends: 57 [2021-05-06 04:22:19,169 INFO L226 Difference]: Without dead ends: 55 [2021-05-06 04:22:19,169 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 131.6ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-06 04:22:19,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-06 04:22:19,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2021-05-06 04:22:19,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 38 states have internal predecessors, (41), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 04:22:19,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2021-05-06 04:22:19,181 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 28 [2021-05-06 04:22:19,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:22:19,182 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2021-05-06 04:22:19,182 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 04:22:19,182 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2021-05-06 04:22:19,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-06 04:22:19,183 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:22:19,183 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:22:19,388 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:22:19,389 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:22:19,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:22:19,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1513703477, now seen corresponding path program 1 times [2021-05-06 04:22:19,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:22:19,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283236073] [2021-05-06 04:22:19,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:22:19,397 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:22:19,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [499077116] [2021-05-06 04:22:19,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:22:19,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:22:19,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-06 04:22:19,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:22:19,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:19,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:22:19,583 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 04:22:19,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:22:19,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283236073] [2021-05-06 04:22:19,583 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:22:19,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499077116] [2021-05-06 04:22:19,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499077116] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:22:19,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:22:19,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 04:22:19,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725363454] [2021-05-06 04:22:19,596 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 04:22:19,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:22:19,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 04:22:19,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 04:22:19,597 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4)