/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/hard-ll_valuebound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 03:13:07,795 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 03:13:07,797 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 03:13:07,829 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 03:13:07,844 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 03:13:07,860 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 03:13:07,861 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 03:13:07,861 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 03:13:07,862 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 03:13:07,862 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 03:13:07,869 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 03:13:07,872 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 03:13:07,873 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 03:13:07,874 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 03:13:07,876 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 03:13:07,878 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 03:13:07,881 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 03:13:07,886 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 03:13:07,886 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 03:13:07,887 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 03:13:07,893 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-06 03:13:07,914 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 03:13:07,915 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 03:13:07,917 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 03:13:07,917 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 03:13:07,917 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 03:13:07,917 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 03:13:07,918 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 03:13:07,918 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 03:13:07,918 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 03:13:07,918 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 03:13:07,919 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 03:13:07,919 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 03:13:07,919 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 03:13:07,919 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 03:13:07,919 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 03:13:07,919 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 03:13:07,919 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 03:13:07,919 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 03:13:07,920 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 03:13:07,920 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 03:13:07,920 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 03:13:07,920 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 03:13:07,920 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 03:13:07,920 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 03:13:07,920 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 03:13:07,920 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 03:13:07,921 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 03:13:07,921 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 03:13:07,921 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 03:13:08,183 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 03:13:08,198 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 03:13:08,199 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 03:13:08,200 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 03:13:08,201 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 03:13:08,202 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound2.c [2021-05-06 03:13:08,251 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4bbe44fa0/b64866dbaf064b4f8737d9bc8149026a/FLAGb69e4bd46 [2021-05-06 03:13:08,631 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 03:13:08,631 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound2.c [2021-05-06 03:13:08,636 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4bbe44fa0/b64866dbaf064b4f8737d9bc8149026a/FLAGb69e4bd46 [2021-05-06 03:13:08,650 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4bbe44fa0/b64866dbaf064b4f8737d9bc8149026a [2021-05-06 03:13:08,653 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 03:13:08,654 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 03:13:08,657 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 03:13:08,657 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 03:13:08,659 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 03:13:08,660 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 03:13:08" (1/1) ... [2021-05-06 03:13:08,661 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e2bbb27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:13:08, skipping insertion in model container [2021-05-06 03:13:08,661 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 03:13:08" (1/1) ... [2021-05-06 03:13:08,666 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 03:13:08,681 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 03:13:08,803 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound2.c[546,559] [2021-05-06 03:13:08,820 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 03:13:08,828 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 03:13:08,838 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/hard-ll_valuebound2.c[546,559] [2021-05-06 03:13:08,865 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 03:13:08,885 INFO L208 MainTranslator]: Completed translation [2021-05-06 03:13:08,885 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:13:08 WrapperNode [2021-05-06 03:13:08,885 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 03:13:08,888 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 03:13:08,888 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 03:13:08,891 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 03:13:08,899 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:13:08" (1/1) ... [2021-05-06 03:13:08,899 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:13:08" (1/1) ... [2021-05-06 03:13:08,910 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:13:08" (1/1) ... [2021-05-06 03:13:08,911 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:13:08" (1/1) ... [2021-05-06 03:13:08,921 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:13:08" (1/1) ... [2021-05-06 03:13:08,924 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:13:08" (1/1) ... [2021-05-06 03:13:08,930 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:13:08" (1/1) ... [2021-05-06 03:13:08,931 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 03:13:08,932 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 03:13:08,932 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 03:13:08,932 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 03:13:08,932 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:13:08" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 03:13:08,997 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 03:13:08,997 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 03:13:08,997 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 03:13:08,997 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 03:13:08,997 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 03:13:08,997 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 03:13:08,997 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 03:13:08,998 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 03:13:08,998 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 03:13:08,998 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 03:13:08,998 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-06 03:13:08,998 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 03:13:08,999 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 03:13:08,999 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 03:13:08,999 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 03:13:08,999 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 03:13:08,999 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 03:13:08,999 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 03:13:09,000 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 03:13:09,000 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 03:13:09,171 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 03:13:09,171 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 03:13:09,172 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 03:13:09 BoogieIcfgContainer [2021-05-06 03:13:09,172 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 03:13:09,173 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 03:13:09,173 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 03:13:09,175 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 03:13:09,175 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 03:13:08" (1/3) ... [2021-05-06 03:13:09,176 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a727cb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 03:13:09, skipping insertion in model container [2021-05-06 03:13:09,176 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:13:08" (2/3) ... [2021-05-06 03:13:09,176 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a727cb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 03:13:09, skipping insertion in model container [2021-05-06 03:13:09,176 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 03:13:09" (3/3) ... [2021-05-06 03:13:09,187 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-ll_valuebound2.c [2021-05-06 03:13:09,191 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 03:13:09,193 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 03:13:09,203 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 03:13:09,217 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 03:13:09,217 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 03:13:09,217 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 03:13:09,218 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 03:13:09,218 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 03:13:09,218 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 03:13:09,218 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 03:13:09,218 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 03:13:09,228 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 03:13:09,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 03:13:09,231 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:13:09,232 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:13:09,232 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:13:09,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:13:09,235 INFO L82 PathProgramCache]: Analyzing trace with hash -1784424332, now seen corresponding path program 1 times [2021-05-06 03:13:09,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:13:09,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193036483] [2021-05-06 03:13:09,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:13:09,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:13:09,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 03:13:09,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:13:09,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 03:13:09,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:13:09,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 03:13:09,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:13:09,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 03:13:09,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:13:09,486 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 03:13:09,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:13:09,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193036483] [2021-05-06 03:13:09,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193036483] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:13:09,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:13:09,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 03:13:09,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506298724] [2021-05-06 03:13:09,491 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 03:13:09,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:13:09,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 03:13:09,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 03:13:09,504 INFO L87 Difference]: Start difference. First operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 03:13:09,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:13:09,643 INFO L93 Difference]: Finished difference Result 69 states and 110 transitions. [2021-05-06 03:13:09,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 03:13:09,645 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2021-05-06 03:13:09,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:13:09,650 INFO L225 Difference]: With dead ends: 69 [2021-05-06 03:13:09,650 INFO L226 Difference]: Without dead ends: 33 [2021-05-06 03:13:09,654 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 49.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 03:13:09,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-06 03:13:09,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-06 03:13:09,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 03:13:09,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2021-05-06 03:13:09,702 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 28 [2021-05-06 03:13:09,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:13:09,702 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2021-05-06 03:13:09,702 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 03:13:09,703 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2021-05-06 03:13:09,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 03:13:09,704 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:13:09,704 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:13:09,704 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 03:13:09,705 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:13:09,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:13:09,707 INFO L82 PathProgramCache]: Analyzing trace with hash 1361835634, now seen corresponding path program 1 times [2021-05-06 03:13:09,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:13:09,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141982591] [2021-05-06 03:13:09,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:13:09,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:13:09,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 03:13:09,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:13:09,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 03:13:09,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:13:09,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 03:13:09,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:13:09,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 03:13:09,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:13:09,873 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 03:13:09,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:13:09,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141982591] [2021-05-06 03:13:09,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141982591] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:13:09,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:13:09,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 03:13:09,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032107800] [2021-05-06 03:13:09,875 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 03:13:09,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:13:09,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 03:13:09,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:13:09,876 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 03:13:10,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:13:10,141 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2021-05-06 03:13:10,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 03:13:10,141 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2021-05-06 03:13:10,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:13:10,142 INFO L225 Difference]: With dead ends: 46 [2021-05-06 03:13:10,142 INFO L226 Difference]: Without dead ends: 44 [2021-05-06 03:13:10,143 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 119.9ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 03:13:10,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-06 03:13:10,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2021-05-06 03:13:10,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 03:13:10,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2021-05-06 03:13:10,150 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 28 [2021-05-06 03:13:10,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:13:10,150 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2021-05-06 03:13:10,150 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 03:13:10,150 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2021-05-06 03:13:10,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 03:13:10,151 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:13:10,151 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 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 03:13:10,151 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 03:13:10,151 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:13:10,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:13:10,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1382067636, now seen corresponding path program 1 times [2021-05-06 03:13:10,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:13:10,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303299790] [2021-05-06 03:13:10,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:13:10,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:13:10,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 03:13:10,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:13:10,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 03:13:10,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:13:10,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 03:13:10,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:13:10,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 03:13:10,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:13:10,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-05-06 03:13:10,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:13:10,228 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 03:13:10,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:13:10,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303299790] [2021-05-06 03:13:10,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303299790] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:13:10,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:13:10,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 03:13:10,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867399914] [2021-05-06 03:13:10,228 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 03:13:10,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:13:10,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 03:13:10,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:13:10,229 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 03:13:10,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:13:10,456 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2021-05-06 03:13:10,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 03:13:10,456 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-06 03:13:10,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:13:10,457 INFO L225 Difference]: With dead ends: 50 [2021-05-06 03:13:10,457 INFO L226 Difference]: Without dead ends: 48 [2021-05-06 03:13:10,457 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 101.7ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 03:13:10,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-06 03:13:10,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2021-05-06 03:13:10,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 03:13:10,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2021-05-06 03:13:10,463 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 33 [2021-05-06 03:13:10,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:13:10,463 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2021-05-06 03:13:10,464 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 03:13:10,464 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2021-05-06 03:13:10,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-06 03:13:10,464 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:13:10,464 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:13:10,464 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-06 03:13:10,464 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:13:10,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:13:10,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1455208590, now seen corresponding path program 1 times [2021-05-06 03:13:10,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:13:10,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586354194] [2021-05-06 03:13:10,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:13:10,473 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:13:10,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [523792340] [2021-05-06 03:13:10,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:13:10,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:13:10,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 03:13:10,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:13:10,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:10,661 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-06 03:13:10,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:13:10,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586354194] [2021-05-06 03:13:10,662 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:13:10,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523792340] [2021-05-06 03:13:10,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523792340] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:13:10,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:13:10,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 03:13:10,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323636721] [2021-05-06 03:13:10,662 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 03:13:10,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:13:10,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 03:13:10,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 03:13:10,663 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-06 03:13:10,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:13:10,720 INFO L93 Difference]: Finished difference Result 69 states and 89 transitions. [2021-05-06 03:13:10,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 03:13:10,721 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 38 [2021-05-06 03:13:10,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:13:10,721 INFO L225 Difference]: With dead ends: 69 [2021-05-06 03:13:10,722 INFO L226 Difference]: Without dead ends: 55 [2021-05-06 03:13:10,722 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.4ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:13:10,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-06 03:13:10,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-05-06 03:13:10,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 32 states have internal predecessors, (35), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 03:13:10,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2021-05-06 03:13:10,729 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 38 [2021-05-06 03:13:10,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:13:10,730 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2021-05-06 03:13:10,730 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-06 03:13:10,730 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2021-05-06 03:13:10,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-06 03:13:10,731 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:13:10,731 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:13:10,944 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:13:10,945 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:13:10,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:13:10,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1688067263, now seen corresponding path program 1 times [2021-05-06 03:13:10,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:13:10,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320033501] [2021-05-06 03:13:10,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:13:10,952 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:13:10,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [696897730] [2021-05-06 03:13:10,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:13:11,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:13:11,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 03:13:11,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:13:11,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:11,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:11,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:11,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:11,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:11,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:11,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:11,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:11,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:11,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:11,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:11,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:11,231 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-05-06 03:13:11,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:13:11,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320033501] [2021-05-06 03:13:11,232 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:13:11,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696897730] [2021-05-06 03:13:11,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696897730] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:13:11,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:13:11,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 03:13:11,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051258217] [2021-05-06 03:13:11,236 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 03:13:11,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:13:11,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 03:13:11,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 03:13:11,237 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 03:13:11,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:13:11,382 INFO L93 Difference]: Finished difference Result 69 states and 79 transitions. [2021-05-06 03:13:11,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 03:13:11,383 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 45 [2021-05-06 03:13:11,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:13:11,384 INFO L225 Difference]: With dead ends: 69 [2021-05-06 03:13:11,384 INFO L226 Difference]: Without dead ends: 58 [2021-05-06 03:13:11,384 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 63.8ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-06 03:13:11,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-06 03:13:11,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-05-06 03:13:11,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 35 states have internal predecessors, (38), 15 states have call successors, (15), 9 states have call predecessors, (15), 8 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 03:13:11,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2021-05-06 03:13:11,391 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 45 [2021-05-06 03:13:11,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:13:11,392 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2021-05-06 03:13:11,392 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 03:13:11,392 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2021-05-06 03:13:11,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-06 03:13:11,393 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:13:11,393 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 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] [2021-05-06 03:13:11,593 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:13:11,594 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:13:11,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:13:11,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1471734606, now seen corresponding path program 1 times [2021-05-06 03:13:11,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:13:11,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229127279] [2021-05-06 03:13:11,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:13:11,601 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:13:11,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1353453383] [2021-05-06 03:13:11,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:13:11,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:13:11,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-06 03:13:11,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:13:11,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:11,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:11,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:11,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:11,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:11,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:11,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:11,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:11,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:11,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:11,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:11,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:11,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:11,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:11,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:11,893 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-05-06 03:13:11,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:13:11,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229127279] [2021-05-06 03:13:11,894 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:13:11,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353453383] [2021-05-06 03:13:11,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353453383] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:13:11,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:13:11,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 03:13:11,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431867556] [2021-05-06 03:13:11,895 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 03:13:11,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:13:11,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 03:13:11,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-06 03:13:11,897 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-06 03:13:12,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:13:12,064 INFO L93 Difference]: Finished difference Result 91 states and 115 transitions. [2021-05-06 03:13:12,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 03:13:12,065 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 55 [2021-05-06 03:13:12,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:13:12,068 INFO L225 Difference]: With dead ends: 91 [2021-05-06 03:13:12,068 INFO L226 Difference]: Without dead ends: 77 [2021-05-06 03:13:12,070 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 58.7ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-06 03:13:12,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-05-06 03:13:12,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2021-05-06 03:13:12,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 46 states have internal predecessors, (50), 23 states have call successors, (23), 10 states have call predecessors, (23), 9 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-06 03:13:12,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 93 transitions. [2021-05-06 03:13:12,094 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 93 transitions. Word has length 55 [2021-05-06 03:13:12,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:13:12,095 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 93 transitions. [2021-05-06 03:13:12,095 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-06 03:13:12,095 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 93 transitions. [2021-05-06 03:13:12,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-05-06 03:13:12,098 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:13:12,099 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:13:12,314 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:13:12,315 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:13:12,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:13:12,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1784683007, now seen corresponding path program 1 times [2021-05-06 03:13:12,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:13:12,315 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513875560] [2021-05-06 03:13:12,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:13:12,328 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:13:12,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1538970127] [2021-05-06 03:13:12,328 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 03:13:12,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:13:12,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 03:13:12,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:13:12,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:12,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:12,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:12,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:12,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:12,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:12,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:12,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:12,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:12,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:12,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:12,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:12,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:12,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:12,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:12,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:12,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:12,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:12,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:12,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:12,634 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-05-06 03:13:12,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:13:12,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513875560] [2021-05-06 03:13:12,635 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:13:12,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538970127] [2021-05-06 03:13:12,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538970127] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:13:12,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:13:12,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 03:13:12,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023934879] [2021-05-06 03:13:12,637 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 03:13:12,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:13:12,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 03:13:12,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-06 03:13:12,637 INFO L87 Difference]: Start difference. First operand 77 states and 93 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 03:13:12,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:13:12,783 INFO L93 Difference]: Finished difference Result 96 states and 111 transitions. [2021-05-06 03:13:12,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 03:13:12,786 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 62 [2021-05-06 03:13:12,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:13:12,788 INFO L225 Difference]: With dead ends: 96 [2021-05-06 03:13:12,788 INFO L226 Difference]: Without dead ends: 89 [2021-05-06 03:13:12,789 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 71.9ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-06 03:13:12,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-05-06 03:13:12,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-05-06 03:13:12,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 53 states have (on average 1.0943396226415094) internal successors, (58), 55 states have internal predecessors, (58), 23 states have call successors, (23), 13 states have call predecessors, (23), 12 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-06 03:13:12,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 101 transitions. [2021-05-06 03:13:12,802 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 101 transitions. Word has length 62 [2021-05-06 03:13:12,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:13:12,802 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 101 transitions. [2021-05-06 03:13:12,802 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 03:13:12,802 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 101 transitions. [2021-05-06 03:13:12,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-06 03:13:12,804 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:13:12,804 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:13:13,021 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:13:13,021 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:13:13,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:13:13,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1254068366, now seen corresponding path program 2 times [2021-05-06 03:13:13,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:13:13,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778069803] [2021-05-06 03:13:13,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:13:13,027 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:13:13,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [844288111] [2021-05-06 03:13:13,027 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 03:13:13,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 03:13:13,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:13:13,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-06 03:13:13,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:13:13,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:13,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:13,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:13,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:13,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:13,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:13,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:13,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:13,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:13,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:13,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:13,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:13,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:13,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:13,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:13,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:13,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:13,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:13,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:13,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:13,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:13,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:13,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:13,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:13,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:13,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:13,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:13,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:13,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:13,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:13,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:13,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:13,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:13,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:13,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:13,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:13,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:13,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:13,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:13,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:13,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:13,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:13,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:13,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:13,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:13,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:13,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:13,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:13,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:13,493 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 19 proven. 16 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-05-06 03:13:13,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:13:13,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778069803] [2021-05-06 03:13:13,493 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:13:13,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844288111] [2021-05-06 03:13:13,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844288111] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:13:13,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:13:13,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 03:13:13,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080818287] [2021-05-06 03:13:13,494 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 03:13:13,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:13:13,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 03:13:13,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-05-06 03:13:13,494 INFO L87 Difference]: Start difference. First operand 89 states and 101 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 03:13:13,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:13:13,753 INFO L93 Difference]: Finished difference Result 110 states and 129 transitions. [2021-05-06 03:13:13,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 03:13:13,754 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) Word has length 72 [2021-05-06 03:13:13,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:13:13,754 INFO L225 Difference]: With dead ends: 110 [2021-05-06 03:13:13,755 INFO L226 Difference]: Without dead ends: 102 [2021-05-06 03:13:13,755 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 160.2ms TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-05-06 03:13:13,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-05-06 03:13:13,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2021-05-06 03:13:13,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 60 states have (on average 1.1) internal successors, (66), 62 states have internal predecessors, (66), 28 states have call successors, (28), 14 states have call predecessors, (28), 13 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-06 03:13:13,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 119 transitions. [2021-05-06 03:13:13,762 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 119 transitions. Word has length 72 [2021-05-06 03:13:13,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:13:13,763 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 119 transitions. [2021-05-06 03:13:13,763 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 03:13:13,763 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 119 transitions. [2021-05-06 03:13:13,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-06 03:13:13,763 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:13:13,763 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:13:13,976 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:13:13,977 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:13:13,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:13:13,977 INFO L82 PathProgramCache]: Analyzing trace with hash 680531353, now seen corresponding path program 1 times [2021-05-06 03:13:13,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:13:13,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495089320] [2021-05-06 03:13:13,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:13:13,983 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:13:13,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1606576287] [2021-05-06 03:13:13,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:13:14,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:13:14,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-06 03:13:14,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:13:14,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:14,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:14,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:14,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:14,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:14,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:14,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:14,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:14,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:14,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:14,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:14,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:14,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:14,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:14,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:14,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:14,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:14,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:14,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:14,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:14,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:14,470 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 42 proven. 8 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-05-06 03:13:14,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:13:14,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495089320] [2021-05-06 03:13:14,470 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:13:14,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606576287] [2021-05-06 03:13:14,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606576287] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:13:14,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:13:14,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-06 03:13:14,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730006970] [2021-05-06 03:13:14,471 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 03:13:14,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:13:14,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 03:13:14,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-05-06 03:13:14,471 INFO L87 Difference]: Start difference. First operand 102 states and 119 transitions. Second operand has 15 states, 14 states have (on average 2.0) internal successors, (28), 12 states have internal predecessors, (28), 6 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 03:13:14,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:13:14,710 INFO L93 Difference]: Finished difference Result 112 states and 127 transitions. [2021-05-06 03:13:14,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 03:13:14,710 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 12 states have internal predecessors, (28), 6 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) Word has length 75 [2021-05-06 03:13:14,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:13:14,717 INFO L225 Difference]: With dead ends: 112 [2021-05-06 03:13:14,717 INFO L226 Difference]: Without dead ends: 110 [2021-05-06 03:13:14,717 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 180.5ms TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-05-06 03:13:14,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-05-06 03:13:14,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2021-05-06 03:13:14,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 66 states have (on average 1.0909090909090908) internal successors, (72), 68 states have internal predecessors, (72), 28 states have call successors, (28), 16 states have call predecessors, (28), 15 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-06 03:13:14,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 125 transitions. [2021-05-06 03:13:14,728 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 125 transitions. Word has length 75 [2021-05-06 03:13:14,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:13:14,728 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 125 transitions. [2021-05-06 03:13:14,729 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 12 states have internal predecessors, (28), 6 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 03:13:14,729 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 125 transitions. [2021-05-06 03:13:14,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-06 03:13:14,729 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:13:14,729 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:13:14,944 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:13:14,945 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:13:14,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:13:14,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1211630783, now seen corresponding path program 2 times [2021-05-06 03:13:14,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:13:14,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409565145] [2021-05-06 03:13:14,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:13:14,951 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:13:14,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1797662313] [2021-05-06 03:13:14,951 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:13:15,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 03:13:15,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:13:15,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 03:13:15,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:13:15,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:15,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:15,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:15,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:15,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:15,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:15,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:15,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:15,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:15,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:15,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:15,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:15,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:15,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:15,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:15,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:15,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:15,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:15,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:15,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:15,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:15,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:15,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:15,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:15,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:15,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:15,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:15,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:15,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:15,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:15,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:15,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:15,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:15,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:15,403 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 21 proven. 18 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2021-05-06 03:13:15,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:13:15,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409565145] [2021-05-06 03:13:15,403 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:13:15,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797662313] [2021-05-06 03:13:15,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797662313] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:13:15,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:13:15,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 03:13:15,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870164484] [2021-05-06 03:13:15,405 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 03:13:15,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:13:15,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 03:13:15,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-05-06 03:13:15,406 INFO L87 Difference]: Start difference. First operand 110 states and 125 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 03:13:15,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:13:15,827 INFO L93 Difference]: Finished difference Result 138 states and 160 transitions. [2021-05-06 03:13:15,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 03:13:15,828 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 79 [2021-05-06 03:13:15,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:13:15,829 INFO L225 Difference]: With dead ends: 138 [2021-05-06 03:13:15,829 INFO L226 Difference]: Without dead ends: 136 [2021-05-06 03:13:15,829 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 262.8ms TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-05-06 03:13:15,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-05-06 03:13:15,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 128. [2021-05-06 03:13:15,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 78 states have (on average 1.1025641025641026) internal successors, (86), 81 states have internal predecessors, (86), 31 states have call successors, (31), 19 states have call predecessors, (31), 18 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2021-05-06 03:13:15,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 145 transitions. [2021-05-06 03:13:15,838 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 145 transitions. Word has length 79 [2021-05-06 03:13:15,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:13:15,838 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 145 transitions. [2021-05-06 03:13:15,839 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 03:13:15,839 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 145 transitions. [2021-05-06 03:13:15,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-06 03:13:15,839 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:13:15,839 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:13:16,056 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-06 03:13:16,057 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:13:16,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:13:16,057 INFO L82 PathProgramCache]: Analyzing trace with hash -815356955, now seen corresponding path program 1 times [2021-05-06 03:13:16,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:13:16,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536514470] [2021-05-06 03:13:16,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:13:16,070 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:13:16,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1038922476] [2021-05-06 03:13:16,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:13:16,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:13:16,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 03:13:16,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:13:16,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:16,251 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2021-05-06 03:13:16,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:13:16,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536514470] [2021-05-06 03:13:16,251 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:13:16,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038922476] [2021-05-06 03:13:16,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038922476] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:13:16,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:13:16,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 03:13:16,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853215307] [2021-05-06 03:13:16,252 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 03:13:16,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:13:16,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 03:13:16,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 03:13:16,252 INFO L87 Difference]: Start difference. First operand 128 states and 145 transitions. Second operand has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-06 03:13:16,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:13:16,346 INFO L93 Difference]: Finished difference Result 147 states and 172 transitions. [2021-05-06 03:13:16,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 03:13:16,347 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 86 [2021-05-06 03:13:16,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:13:16,349 INFO L225 Difference]: With dead ends: 147 [2021-05-06 03:13:16,349 INFO L226 Difference]: Without dead ends: 123 [2021-05-06 03:13:16,349 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 34.1ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-06 03:13:16,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-05-06 03:13:16,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 120. [2021-05-06 03:13:16,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 72 states have (on average 1.1388888888888888) internal successors, (82), 75 states have internal predecessors, (82), 31 states have call successors, (31), 17 states have call predecessors, (31), 16 states have return successors, (29), 27 states have call predecessors, (29), 29 states have call successors, (29) [2021-05-06 03:13:16,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 142 transitions. [2021-05-06 03:13:16,357 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 142 transitions. Word has length 86 [2021-05-06 03:13:16,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:13:16,357 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 142 transitions. [2021-05-06 03:13:16,357 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-06 03:13:16,357 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 142 transitions. [2021-05-06 03:13:16,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-06 03:13:16,358 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:13:16,358 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:13:16,574 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-06 03:13:16,574 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:13:16,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:13:16,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1094644914, now seen corresponding path program 3 times [2021-05-06 03:13:16,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:13:16,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589770654] [2021-05-06 03:13:16,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:13:16,580 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:13:16,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1222927480] [2021-05-06 03:13:16,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:13:16,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 03:13:16,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:13:16,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-06 03:13:16,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:13:16,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:16,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:16,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:16,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:16,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:16,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:16,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:16,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:16,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:16,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:16,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:16,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:16,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:16,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:16,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:16,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:16,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:16,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:16,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:16,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:16,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:16,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:16,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:16,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:16,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:16,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:16,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:16,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:16,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:16,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:16,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:16,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:16,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:16,947 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 73 proven. 7 refuted. 0 times theorem prover too weak. 201 trivial. 0 not checked. [2021-05-06 03:13:16,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:13:16,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589770654] [2021-05-06 03:13:16,948 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:13:16,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222927480] [2021-05-06 03:13:16,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222927480] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:13:16,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:13:16,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 03:13:16,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985797981] [2021-05-06 03:13:16,948 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 03:13:16,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:13:16,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 03:13:16,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-06 03:13:16,949 INFO L87 Difference]: Start difference. First operand 120 states and 142 transitions. Second operand has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 10 states have internal predecessors, (26), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 03:13:19,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:13:19,339 INFO L93 Difference]: Finished difference Result 159 states and 194 transitions. [2021-05-06 03:13:19,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 03:13:19,339 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 10 states have internal predecessors, (26), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) Word has length 89 [2021-05-06 03:13:19,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:13:19,340 INFO L225 Difference]: With dead ends: 159 [2021-05-06 03:13:19,340 INFO L226 Difference]: Without dead ends: 142 [2021-05-06 03:13:19,340 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 129.9ms TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-05-06 03:13:19,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-05-06 03:13:19,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2021-05-06 03:13:19,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 85 states have (on average 1.1411764705882352) internal successors, (97), 88 states have internal predecessors, (97), 39 states have call successors, (39), 18 states have call predecessors, (39), 17 states have return successors, (37), 35 states have call predecessors, (37), 37 states have call successors, (37) [2021-05-06 03:13:19,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 173 transitions. [2021-05-06 03:13:19,350 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 173 transitions. Word has length 89 [2021-05-06 03:13:19,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:13:19,351 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 173 transitions. [2021-05-06 03:13:19,351 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 10 states have internal predecessors, (26), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 03:13:19,351 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 173 transitions. [2021-05-06 03:13:19,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-06 03:13:19,351 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:13:19,351 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:13:19,570 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:13:19,573 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:13:19,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:13:19,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1885636697, now seen corresponding path program 2 times [2021-05-06 03:13:19,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:13:19,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961674091] [2021-05-06 03:13:19,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:13:19,590 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:13:19,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [513517221] [2021-05-06 03:13:19,590 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:13:19,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 03:13:19,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:13:19,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-06 03:13:19,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:13:19,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:19,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:19,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:19,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:19,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:19,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:19,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:19,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:19,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:19,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:19,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:19,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:19,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:19,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:19,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:19,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:19,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:19,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:19,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:19,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:19,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:19,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:19,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:19,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:19,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:19,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:20,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:20,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:20,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:20,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:20,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:20,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:20,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:20,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:20,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:13:20,109 WARN L159 QuantifierPusher]: Ignoring assumption.