/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/geo2-ll_unwindbound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 02:45:04,846 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 02:45:04,848 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 02:45:04,878 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 02:45:04,894 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 02:45:04,895 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 02:45:04,896 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 02:45:04,897 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 02:45:04,899 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 02:45:04,900 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 02:45:04,901 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 02:45:04,905 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 02:45:04,906 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 02:45:04,907 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 02:45:04,908 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 02:45:04,909 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 02:45:04,914 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 02:45:04,921 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 02:45:04,922 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 02:45:04,922 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 02:45:04,925 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 02:45:04,953 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 02:45:04,953 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 02:45:04,955 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 02:45:04,956 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 02:45:04,956 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 02:45:04,956 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 02:45:04,956 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 02:45:04,956 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 02:45:04,956 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 02:45:04,957 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 02:45:04,957 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 02:45:04,957 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 02:45:04,957 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 02:45:04,958 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 02:45:04,958 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 02:45:04,958 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 02:45:04,958 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 02:45:04,958 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 02:45:04,958 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 02:45:04,958 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 02:45:04,959 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 02:45:04,959 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 02:45:04,959 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 02:45:04,959 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 02:45:04,959 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 02:45:04,959 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 02:45:04,959 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 02:45:04,960 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 02:45:04,960 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 02:45:05,256 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 02:45:05,270 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 02:45:05,271 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 02:45:05,272 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 02:45:05,273 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 02:45:05,274 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/geo2-ll_unwindbound10.c [2021-05-06 02:45:05,315 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b0c859eb5/6aecfffee4a346a294e26136128b4b16/FLAG997f3f2e4 [2021-05-06 02:45:05,626 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 02:45:05,627 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/geo2-ll_unwindbound10.c [2021-05-06 02:45:05,631 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b0c859eb5/6aecfffee4a346a294e26136128b4b16/FLAG997f3f2e4 [2021-05-06 02:45:06,062 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b0c859eb5/6aecfffee4a346a294e26136128b4b16 [2021-05-06 02:45:06,065 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 02:45:06,067 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 02:45:06,070 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 02:45:06,070 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 02:45:06,073 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 02:45:06,073 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 02:45:06" (1/1) ... [2021-05-06 02:45:06,074 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18d54b54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:45:06, skipping insertion in model container [2021-05-06 02:45:06,075 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 02:45:06" (1/1) ... [2021-05-06 02:45:06,080 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 02:45:06,090 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 02:45:06,187 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/geo2-ll_unwindbound10.c[525,538] [2021-05-06 02:45:06,195 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 02:45:06,200 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 02:45:06,208 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/geo2-ll_unwindbound10.c[525,538] [2021-05-06 02:45:06,213 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 02:45:06,274 INFO L208 MainTranslator]: Completed translation [2021-05-06 02:45:06,275 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:45:06 WrapperNode [2021-05-06 02:45:06,275 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 02:45:06,276 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 02:45:06,276 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 02:45:06,276 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 02:45:06,284 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:45:06" (1/1) ... [2021-05-06 02:45:06,284 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:45:06" (1/1) ... [2021-05-06 02:45:06,288 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:45:06" (1/1) ... [2021-05-06 02:45:06,289 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:45:06" (1/1) ... [2021-05-06 02:45:06,294 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:45:06" (1/1) ... [2021-05-06 02:45:06,298 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:45:06" (1/1) ... [2021-05-06 02:45:06,301 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:45:06" (1/1) ... [2021-05-06 02:45:06,305 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 02:45:06,306 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 02:45:06,306 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 02:45:06,306 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 02:45:06,306 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:45:06" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 02:45:06,361 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 02:45:06,361 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 02:45:06,361 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 02:45:06,361 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 02:45:06,361 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 02:45:06,361 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 02:45:06,362 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 02:45:06,362 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 02:45:06,362 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 02:45:06,362 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 02:45:06,362 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 02:45:06,362 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 02:45:06,363 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 02:45:06,363 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 02:45:06,364 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 02:45:06,365 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 02:45:06,365 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 02:45:06,365 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 02:45:06,365 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 02:45:06,365 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 02:45:06,574 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 02:45:06,574 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 02:45:06,575 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 02:45:06 BoogieIcfgContainer [2021-05-06 02:45:06,575 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 02:45:06,576 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 02:45:06,576 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 02:45:06,578 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 02:45:06,578 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 02:45:06" (1/3) ... [2021-05-06 02:45:06,578 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28f5cde5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 02:45:06, skipping insertion in model container [2021-05-06 02:45:06,578 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:45:06" (2/3) ... [2021-05-06 02:45:06,579 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28f5cde5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 02:45:06, skipping insertion in model container [2021-05-06 02:45:06,579 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 02:45:06" (3/3) ... [2021-05-06 02:45:06,579 INFO L111 eAbstractionObserver]: Analyzing ICFG geo2-ll_unwindbound10.c [2021-05-06 02:45:06,583 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 02:45:06,585 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 02:45:06,595 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 02:45:06,608 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 02:45:06,608 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 02:45:06,608 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 02:45:06,609 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 02:45:06,609 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 02:45:06,609 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 02:45:06,609 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 02:45:06,609 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 02:45:06,635 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 02:45:06,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-06 02:45:06,638 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:45:06,638 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:45:06,638 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:45:06,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:45:06,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1665267581, now seen corresponding path program 1 times [2021-05-06 02:45:06,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:45:06,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240975980] [2021-05-06 02:45:06,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:45:06,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:45:06,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 02:45:06,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:45:06,850 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 02:45:06,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:45:06,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240975980] [2021-05-06 02:45:06,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240975980] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:45:06,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:45:06,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 02:45:06,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371240505] [2021-05-06 02:45:06,855 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 02:45:06,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:45:06,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 02:45:06,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 02:45:06,867 INFO L87 Difference]: Start difference. First operand has 22 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 02:45:06,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:45:06,936 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2021-05-06 02:45:06,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 02:45:06,938 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-06 02:45:06,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:45:06,943 INFO L225 Difference]: With dead ends: 39 [2021-05-06 02:45:06,943 INFO L226 Difference]: Without dead ends: 18 [2021-05-06 02:45:06,945 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 51.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 02:45:06,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-05-06 02:45:06,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2021-05-06 02:45:06,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 02:45:06,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-05-06 02:45:06,971 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2021-05-06 02:45:06,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:45:06,971 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-05-06 02:45:06,971 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 02:45:06,971 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-05-06 02:45:06,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 02:45:06,972 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:45:06,973 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:45:06,973 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 02:45:06,973 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:45:06,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:45:06,974 INFO L82 PathProgramCache]: Analyzing trace with hash -318583316, now seen corresponding path program 1 times [2021-05-06 02:45:06,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:45:06,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894676418] [2021-05-06 02:45:06,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:45:06,986 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:45:06,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1377678324] [2021-05-06 02:45:06,986 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 02:45:07,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:45:07,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 02:45:07,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:45:07,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:07,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:07,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:07,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:07,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:07,151 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 02:45:07,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:45:07,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894676418] [2021-05-06 02:45:07,152 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:45:07,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377678324] [2021-05-06 02:45:07,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377678324] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:45:07,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:45:07,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 02:45:07,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879864816] [2021-05-06 02:45:07,153 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 02:45:07,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:45:07,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 02:45:07,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 02:45:07,154 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 02:45:07,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:45:07,162 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2021-05-06 02:45:07,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 02:45:07,163 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-06 02:45:07,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:45:07,163 INFO L225 Difference]: With dead ends: 26 [2021-05-06 02:45:07,164 INFO L226 Difference]: Without dead ends: 19 [2021-05-06 02:45:07,164 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.8ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 02:45:07,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-05-06 02:45:07,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-05-06 02:45:07,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 02:45:07,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-05-06 02:45:07,168 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 12 [2021-05-06 02:45:07,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:45:07,168 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-05-06 02:45:07,168 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 02:45:07,168 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-05-06 02:45:07,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 02:45:07,169 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:45:07,169 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:45:07,389 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 02:45:07,390 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:45:07,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:45:07,390 INFO L82 PathProgramCache]: Analyzing trace with hash -316795856, now seen corresponding path program 1 times [2021-05-06 02:45:07,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:45:07,391 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940362478] [2021-05-06 02:45:07,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:45:07,398 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:45:07,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [573220296] [2021-05-06 02:45:07,399 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 02:45:07,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:45:07,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 02:45:07,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:45:07,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:07,500 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 02:45:07,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:45:07,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940362478] [2021-05-06 02:45:07,500 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:45:07,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573220296] [2021-05-06 02:45:07,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573220296] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:45:07,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:45:07,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 02:45:07,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012282762] [2021-05-06 02:45:07,501 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 02:45:07,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:45:07,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 02:45:07,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:45:07,502 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 02:45:07,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:45:07,525 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2021-05-06 02:45:07,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 02:45:07,525 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-06 02:45:07,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:45:07,526 INFO L225 Difference]: With dead ends: 28 [2021-05-06 02:45:07,526 INFO L226 Difference]: Without dead ends: 25 [2021-05-06 02:45:07,526 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.6ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:45:07,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-06 02:45:07,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-05-06 02:45:07,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 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 02:45:07,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2021-05-06 02:45:07,531 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 12 [2021-05-06 02:45:07,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:45:07,531 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2021-05-06 02:45:07,531 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 02:45:07,531 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2021-05-06 02:45:07,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-06 02:45:07,531 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:45:07,532 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:45:07,753 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:45:07,753 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:45:07,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:45:07,754 INFO L82 PathProgramCache]: Analyzing trace with hash -2089867248, now seen corresponding path program 1 times [2021-05-06 02:45:07,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:45:07,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437139875] [2021-05-06 02:45:07,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:45:07,769 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:45:07,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1282938870] [2021-05-06 02:45:07,769 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 02:45:07,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:45:07,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 02:45:07,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:45:07,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:07,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:07,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:07,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:07,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:07,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:07,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:07,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:07,899 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 02:45:07,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:45:07,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437139875] [2021-05-06 02:45:07,899 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:45:07,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282938870] [2021-05-06 02:45:07,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282938870] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:45:07,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:45:07,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-06 02:45:07,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547620732] [2021-05-06 02:45:07,900 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 02:45:07,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:45:07,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 02:45:07,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:45:07,901 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 02:45:07,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:45:07,923 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2021-05-06 02:45:07,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 02:45:07,924 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-06 02:45:07,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:45:07,924 INFO L225 Difference]: With dead ends: 34 [2021-05-06 02:45:07,924 INFO L226 Difference]: Without dead ends: 27 [2021-05-06 02:45:07,925 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 12.7ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:45:07,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-06 02:45:07,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-06 02:45:07,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 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 02:45:07,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2021-05-06 02:45:07,929 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 20 [2021-05-06 02:45:07,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:45:07,929 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2021-05-06 02:45:07,929 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 02:45:07,930 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2021-05-06 02:45:07,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-06 02:45:07,930 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:45:07,930 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:45:08,148 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:45:08,149 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:45:08,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:45:08,149 INFO L82 PathProgramCache]: Analyzing trace with hash -2088079788, now seen corresponding path program 1 times [2021-05-06 02:45:08,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:45:08,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319366562] [2021-05-06 02:45:08,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:45:08,156 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:45:08,156 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [272566741] [2021-05-06 02:45:08,156 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 02:45:08,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:45:08,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 02:45:08,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:45:08,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:08,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:08,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:08,276 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 02:45:08,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:45:08,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319366562] [2021-05-06 02:45:08,277 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:45:08,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272566741] [2021-05-06 02:45:08,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272566741] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:45:08,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:45:08,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 02:45:08,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171056006] [2021-05-06 02:45:08,277 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 02:45:08,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:45:08,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 02:45:08,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:45:08,278 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 02:45:08,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:45:08,307 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2021-05-06 02:45:08,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 02:45:08,308 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-06 02:45:08,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:45:08,308 INFO L225 Difference]: With dead ends: 36 [2021-05-06 02:45:08,308 INFO L226 Difference]: Without dead ends: 33 [2021-05-06 02:45:08,309 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.1ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:45:08,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-06 02:45:08,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-06 02:45:08,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.1363636363636365) 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), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 02:45:08,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2021-05-06 02:45:08,313 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 20 [2021-05-06 02:45:08,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:45:08,313 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2021-05-06 02:45:08,313 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 02:45:08,313 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2021-05-06 02:45:08,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 02:45:08,313 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:45:08,314 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:45:08,529 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:45:08,531 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:45:08,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:45:08,531 INFO L82 PathProgramCache]: Analyzing trace with hash -696181196, now seen corresponding path program 2 times [2021-05-06 02:45:08,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:45:08,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655139004] [2021-05-06 02:45:08,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:45:08,538 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:45:08,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [730546026] [2021-05-06 02:45:08,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:45:08,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:45:08,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:45:08,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 02:45:08,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:45:08,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:08,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:08,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:08,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:08,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:08,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:08,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:08,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:08,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:08,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:08,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:08,705 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 02:45:08,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:45:08,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655139004] [2021-05-06 02:45:08,706 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:45:08,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730546026] [2021-05-06 02:45:08,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730546026] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:45:08,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:45:08,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 02:45:08,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578807022] [2021-05-06 02:45:08,707 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 02:45:08,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:45:08,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 02:45:08,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:45:08,708 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 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 02:45:08,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:45:08,754 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2021-05-06 02:45:08,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 02:45:08,754 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-05-06 02:45:08,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:45:08,756 INFO L225 Difference]: With dead ends: 42 [2021-05-06 02:45:08,756 INFO L226 Difference]: Without dead ends: 35 [2021-05-06 02:45:08,757 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 20.2ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:45:08,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-06 02:45:08,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-06 02:45:08,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 24 states have (on average 1.125) internal successors, (27), 25 states have internal predecessors, (27), 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 02:45:08,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2021-05-06 02:45:08,769 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 28 [2021-05-06 02:45:08,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:45:08,769 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2021-05-06 02:45:08,769 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 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 02:45:08,769 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2021-05-06 02:45:08,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 02:45:08,770 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:45:08,770 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:45:08,985 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-06 02:45:08,985 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:45:08,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:45:08,986 INFO L82 PathProgramCache]: Analyzing trace with hash -694393736, now seen corresponding path program 2 times [2021-05-06 02:45:08,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:45:08,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263612946] [2021-05-06 02:45:08,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:45:08,999 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:45:08,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1496719517] [2021-05-06 02:45:08,999 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 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 02:45:09,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:45:09,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:45:09,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-06 02:45:09,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:45:09,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:09,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:09,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:09,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:09,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:09,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:09,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:09,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:09,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:09,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:09,798 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 02:45:09,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:45:09,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263612946] [2021-05-06 02:45:09,798 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:45:09,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496719517] [2021-05-06 02:45:09,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496719517] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:45:09,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:45:09,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 02:45:09,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787857300] [2021-05-06 02:45:09,799 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 02:45:09,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:45:09,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 02:45:09,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:45:09,800 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 02:45:43,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:45:43,172 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2021-05-06 02:45:43,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 02:45:43,173 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), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-05-06 02:45:43,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:45:43,174 INFO L225 Difference]: With dead ends: 44 [2021-05-06 02:45:43,174 INFO L226 Difference]: Without dead ends: 41 [2021-05-06 02:45:43,174 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 575.0ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-06 02:45:43,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-06 02:45:43,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-05-06 02:45:43,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 29 states have internal predecessors, (31), 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 02:45:43,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2021-05-06 02:45:43,179 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 28 [2021-05-06 02:45:43,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:45:43,179 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2021-05-06 02:45:43,180 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), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 02:45:43,180 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2021-05-06 02:45:43,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-06 02:45:43,180 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:45:43,180 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:45:43,381 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:45:43,381 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:45:43,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:45:43,382 INFO L82 PathProgramCache]: Analyzing trace with hash 618442840, now seen corresponding path program 3 times [2021-05-06 02:45:43,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:45:43,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34532501] [2021-05-06 02:45:43,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:45:43,388 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:45:43,388 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [639602852] [2021-05-06 02:45:43,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:45:43,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-06 02:45:43,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:45:43,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 02:45:43,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:45:43,720 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2021-05-06 02:45:43,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:43,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:43,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:43,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:43,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:43,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:43,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:43,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:43,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:43,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:43,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:43,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:43,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:43,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:43,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:43,816 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-06 02:45:43,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:45:43,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34532501] [2021-05-06 02:45:43,816 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:45:43,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639602852] [2021-05-06 02:45:43,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639602852] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:45:43,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:45:43,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 02:45:43,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590749208] [2021-05-06 02:45:43,817 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:45:43,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:45:43,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:45:43,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:45:43,817 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 02:47:08,858 WARN L205 SmtUtils]: Spent 1.42 m on a formula simplification. DAG size of input: 30 DAG size of output: 25 [2021-05-06 02:47:26,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:47:26,181 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2021-05-06 02:47:26,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 02:47:26,182 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 36 [2021-05-06 02:47:26,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:47:26,182 INFO L225 Difference]: With dead ends: 41 [2021-05-06 02:47:26,182 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 02:47:26,182 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 85214.1ms TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:47:26,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 02:47:26,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 02:47:26,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-06 02:47:26,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 02:47:26,183 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 36 [2021-05-06 02:47:26,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:47:26,183 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 02:47:26,183 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 02:47:26,183 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 02:47:26,183 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 02:47:26,384 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:47:26,385 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-06 02:55:12,206 WARN L205 SmtUtils]: Spent 7.76 m on a formula simplification. DAG size of input: 34 DAG size of output: 34