/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/egcd-ll_unwindbound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 02:19:32,759 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 02:19:32,761 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 02:19:32,784 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 02:19:32,804 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 02:19:32,805 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 02:19:32,806 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 02:19:32,807 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 02:19:32,808 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 02:19:32,808 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 02:19:32,811 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 02:19:32,816 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 02:19:32,818 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 02:19:32,819 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 02:19:32,820 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 02:19:32,822 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 02:19:32,827 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 02:19:32,834 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 02:19:32,834 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 02:19:32,835 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 02:19:32,835 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-06 02:19:32,880 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 02:19:32,880 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 02:19:32,882 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 02:19:32,882 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 02:19:32,883 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 02:19:32,883 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 02:19:32,883 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 02:19:32,883 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 02:19:32,883 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 02:19:32,883 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 02:19:32,884 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 02:19:32,884 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 02:19:32,884 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 02:19:32,884 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 02:19:32,884 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 02:19:32,885 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 02:19:32,885 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 02:19:32,885 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 02:19:32,885 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 02:19:32,885 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 02:19:32,885 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 02:19:32,886 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 02:19:32,886 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 02:19:32,886 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 02:19:32,886 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 02:19:32,886 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 02:19:32,886 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 02:19:32,886 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 02:19:32,886 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 02:19:33,154 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 02:19:33,179 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 02:19:33,181 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 02:19:33,182 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 02:19:33,182 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 02:19:33,183 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_unwindbound10.c [2021-05-06 02:19:33,242 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42ee70086/c53aacc4a20e40ecba4bba68c45b9395/FLAGab963b634 [2021-05-06 02:19:33,575 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 02:19:33,575 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_unwindbound10.c [2021-05-06 02:19:33,580 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42ee70086/c53aacc4a20e40ecba4bba68c45b9395/FLAGab963b634 [2021-05-06 02:19:33,977 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42ee70086/c53aacc4a20e40ecba4bba68c45b9395 [2021-05-06 02:19:33,980 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 02:19:33,982 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 02:19:33,985 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 02:19:33,985 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 02:19:33,988 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 02:19:33,989 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 02:19:33" (1/1) ... [2021-05-06 02:19:33,990 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@178d3db8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:19:33, skipping insertion in model container [2021-05-06 02:19:33,990 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 02:19:33" (1/1) ... [2021-05-06 02:19:33,996 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 02:19:34,007 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 02:19:34,130 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/egcd-ll_unwindbound10.c[489,502] [2021-05-06 02:19:34,141 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 02:19:34,147 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 02:19:34,161 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/egcd-ll_unwindbound10.c[489,502] [2021-05-06 02:19:34,166 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 02:19:34,175 INFO L208 MainTranslator]: Completed translation [2021-05-06 02:19:34,176 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:19:34 WrapperNode [2021-05-06 02:19:34,176 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 02:19:34,177 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 02:19:34,177 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 02:19:34,177 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 02:19:34,218 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:19:34" (1/1) ... [2021-05-06 02:19:34,219 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:19:34" (1/1) ... [2021-05-06 02:19:34,228 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:19:34" (1/1) ... [2021-05-06 02:19:34,228 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:19:34" (1/1) ... [2021-05-06 02:19:34,239 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:19:34" (1/1) ... [2021-05-06 02:19:34,242 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:19:34" (1/1) ... [2021-05-06 02:19:34,248 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:19:34" (1/1) ... [2021-05-06 02:19:34,254 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 02:19:34,255 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 02:19:34,255 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 02:19:34,255 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 02:19:34,256 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:19:34" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 02:19:34,333 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 02:19:34,333 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 02:19:34,333 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 02:19:34,334 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 02:19:34,334 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 02:19:34,334 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 02:19:34,334 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 02:19:34,334 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 02:19:34,335 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 02:19:34,335 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 02:19:34,335 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 02:19:34,335 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 02:19:34,336 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 02:19:34,336 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 02:19:34,337 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 02:19:34,337 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 02:19:34,337 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 02:19:34,337 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 02:19:34,337 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 02:19:34,337 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 02:19:34,557 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 02:19:34,558 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 02:19:34,558 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 02:19:34 BoogieIcfgContainer [2021-05-06 02:19:34,559 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 02:19:34,560 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 02:19:34,560 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 02:19:34,562 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 02:19:34,562 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 02:19:33" (1/3) ... [2021-05-06 02:19:34,562 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46b34864 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 02:19:34, skipping insertion in model container [2021-05-06 02:19:34,562 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:19:34" (2/3) ... [2021-05-06 02:19:34,563 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46b34864 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 02:19:34, skipping insertion in model container [2021-05-06 02:19:34,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 02:19:34" (3/3) ... [2021-05-06 02:19:34,563 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd-ll_unwindbound10.c [2021-05-06 02:19:34,567 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 02:19:34,571 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 02:19:34,582 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 02:19:34,606 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 02:19:34,606 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 02:19:34,606 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 02:19:34,606 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 02:19:34,606 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 02:19:34,606 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 02:19:34,607 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 02:19:34,607 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 02:19:34,621 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 02:19:34,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 02:19:34,625 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:19:34,625 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:19:34,626 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:19:34,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:19:34,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1226702723, now seen corresponding path program 1 times [2021-05-06 02:19:34,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:19:34,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55068100] [2021-05-06 02:19:34,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:19:34,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:19:34,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 02:19:34,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:19:34,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 02:19:34,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:19:34,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-06 02:19:34,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:19:34,834 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 02:19:34,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:19:34,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55068100] [2021-05-06 02:19:34,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55068100] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:19:34,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:19:34,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 02:19:34,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601638305] [2021-05-06 02:19:34,839 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 02:19:34,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:19:34,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 02:19:34,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 02:19:34,849 INFO L87 Difference]: Start difference. First operand has 35 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 02:19:34,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:19:34,939 INFO L93 Difference]: Finished difference Result 64 states and 97 transitions. [2021-05-06 02:19:34,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 02:19:34,940 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-06 02:19:34,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:19:34,945 INFO L225 Difference]: With dead ends: 64 [2021-05-06 02:19:34,945 INFO L226 Difference]: Without dead ends: 31 [2021-05-06 02:19:34,947 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 02:19:34,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-06 02:19:34,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2021-05-06 02:19:34,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 02:19:34,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2021-05-06 02:19:34,986 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 22 [2021-05-06 02:19:34,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:19:34,986 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2021-05-06 02:19:34,986 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 02:19:34,987 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2021-05-06 02:19:34,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 02:19:34,988 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:19:34,988 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:19:34,988 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 02:19:34,988 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:19:34,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:19:34,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1346542817, now seen corresponding path program 1 times [2021-05-06 02:19:34,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:19:34,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087785768] [2021-05-06 02:19:34,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:19:35,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:19:35,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 02:19:35,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:19:35,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 02:19:35,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:19:35,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-06 02:19:35,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:19:35,105 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 02:19:35,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:19:35,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087785768] [2021-05-06 02:19:35,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087785768] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:19:35,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:19:35,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 02:19:35,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008443495] [2021-05-06 02:19:35,107 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 02:19:35,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:19:35,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 02:19:35,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:19:35,108 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 02:19:35,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:19:35,229 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2021-05-06 02:19:35,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 02:19:35,230 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-06 02:19:35,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:19:35,230 INFO L225 Difference]: With dead ends: 42 [2021-05-06 02:19:35,231 INFO L226 Difference]: Without dead ends: 32 [2021-05-06 02:19:35,231 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 47.8ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:19:35,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-06 02:19:35,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-06 02:19:35,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 02:19:35,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2021-05-06 02:19:35,238 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 23 [2021-05-06 02:19:35,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:19:35,239 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2021-05-06 02:19:35,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 02:19:35,240 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2021-05-06 02:19:35,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 02:19:35,240 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:19:35,240 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:19:35,240 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 02:19:35,240 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:19:35,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:19:35,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1348211113, now seen corresponding path program 1 times [2021-05-06 02:19:35,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:19:35,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999025319] [2021-05-06 02:19:35,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:19:35,273 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:19:35,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [966871895] [2021-05-06 02:19:35,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:19:35,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:19:35,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 02:19:35,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:19:35,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:35,471 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 02:19:35,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:19:35,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999025319] [2021-05-06 02:19:35,472 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:19:35,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966871895] [2021-05-06 02:19:35,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966871895] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:19:35,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:19:35,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 02:19:35,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483077574] [2021-05-06 02:19:35,473 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 02:19:35,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:19:35,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 02:19:35,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:19:35,474 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 02:19:35,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:19:35,510 INFO L93 Difference]: Finished difference Result 49 states and 66 transitions. [2021-05-06 02:19:35,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 02:19:35,511 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2021-05-06 02:19:35,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:19:35,513 INFO L225 Difference]: With dead ends: 49 [2021-05-06 02:19:35,513 INFO L226 Difference]: Without dead ends: 47 [2021-05-06 02:19:35,514 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.2ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:19:35,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-06 02:19:35,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2021-05-06 02:19:35,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 26 states have internal predecessors, (31), 17 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 02:19:35,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 63 transitions. [2021-05-06 02:19:35,531 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 63 transitions. Word has length 23 [2021-05-06 02:19:35,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:19:35,531 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 63 transitions. [2021-05-06 02:19:35,531 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 02:19:35,531 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 63 transitions. [2021-05-06 02:19:35,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 02:19:35,532 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:19:35,532 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:19:35,741 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-06 02:19:35,741 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:19:35,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:19:35,743 INFO L82 PathProgramCache]: Analyzing trace with hash -1060153012, now seen corresponding path program 1 times [2021-05-06 02:19:35,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:19:35,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263582386] [2021-05-06 02:19:35,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:19:35,754 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:19:35,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1822658212] [2021-05-06 02:19:35,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:19:35,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:19:35,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 02:19:35,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:19:35,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:35,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:35,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:35,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:35,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:35,923 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 02:19:35,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:19:35,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263582386] [2021-05-06 02:19:35,924 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:19:35,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822658212] [2021-05-06 02:19:35,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822658212] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:19:35,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:19:35,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-06 02:19:35,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828052775] [2021-05-06 02:19:35,925 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:19:35,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:19:35,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:19:35,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:19:35,926 INFO L87 Difference]: Start difference. First operand 46 states and 63 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 02:19:36,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:19:36,014 INFO L93 Difference]: Finished difference Result 71 states and 104 transitions. [2021-05-06 02:19:36,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 02:19:36,015 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2021-05-06 02:19:36,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:19:36,017 INFO L225 Difference]: With dead ends: 71 [2021-05-06 02:19:36,017 INFO L226 Difference]: Without dead ends: 69 [2021-05-06 02:19:36,017 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 36.4ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:19:36,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-06 02:19:36,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 62. [2021-05-06 02:19:36,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 35 states have internal predecessors, (45), 23 states have call successors, (23), 6 states have call predecessors, (23), 5 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 02:19:36,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 89 transitions. [2021-05-06 02:19:36,028 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 89 transitions. Word has length 28 [2021-05-06 02:19:36,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:19:36,028 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 89 transitions. [2021-05-06 02:19:36,028 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 02:19:36,028 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 89 transitions. [2021-05-06 02:19:36,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 02:19:36,033 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:19:36,033 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:19:36,233 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:19:36,234 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:19:36,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:19:36,235 INFO L82 PathProgramCache]: Analyzing trace with hash -560761015, now seen corresponding path program 1 times [2021-05-06 02:19:36,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:19:36,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810800745] [2021-05-06 02:19:36,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:19:36,243 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:19:36,243 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1026499408] [2021-05-06 02:19:36,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:19:36,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:19:36,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 02:19:36,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:19:36,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:36,369 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-06 02:19:36,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:19:36,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810800745] [2021-05-06 02:19:36,370 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:19:36,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026499408] [2021-05-06 02:19:36,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026499408] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:19:36,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:19:36,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 02:19:36,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450742096] [2021-05-06 02:19:36,370 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 02:19:36,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:19:36,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 02:19:36,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:19:36,371 INFO L87 Difference]: Start difference. First operand 62 states and 89 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 02:19:36,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:19:36,424 INFO L93 Difference]: Finished difference Result 69 states and 95 transitions. [2021-05-06 02:19:36,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 02:19:36,433 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-06 02:19:36,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:19:36,434 INFO L225 Difference]: With dead ends: 69 [2021-05-06 02:19:36,434 INFO L226 Difference]: Without dead ends: 65 [2021-05-06 02:19:36,434 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.1ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:19:36,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-05-06 02:19:36,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-05-06 02:19:36,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 36 states have (on average 1.3333333333333333) internal successors, (48), 38 states have internal predecessors, (48), 22 states have call successors, (22), 7 states have call predecessors, (22), 6 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-06 02:19:36,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 89 transitions. [2021-05-06 02:19:36,442 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 89 transitions. Word has length 33 [2021-05-06 02:19:36,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:19:36,442 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 89 transitions. [2021-05-06 02:19:36,442 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 02:19:36,442 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 89 transitions. [2021-05-06 02:19:36,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-06 02:19:36,443 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:19:36,443 INFO L523 BasicCegarLoop]: trace histogram [4, 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, 1] [2021-05-06 02:19:36,649 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:19:36,650 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:19:36,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:19:36,650 INFO L82 PathProgramCache]: Analyzing trace with hash 201438379, now seen corresponding path program 1 times [2021-05-06 02:19:36,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:19:36,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545302734] [2021-05-06 02:19:36,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:19:36,658 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:19:36,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [531865489] [2021-05-06 02:19:36,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:19:36,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:19:36,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 02:19:36,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:19:36,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:36,781 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-06 02:19:36,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:19:36,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545302734] [2021-05-06 02:19:36,781 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:19:36,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531865489] [2021-05-06 02:19:36,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531865489] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:19:36,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:19:36,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 02:19:36,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828748938] [2021-05-06 02:19:36,782 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 02:19:36,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:19:36,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 02:19:36,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:19:36,783 INFO L87 Difference]: Start difference. First operand 65 states and 89 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-05-06 02:19:36,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:19:36,824 INFO L93 Difference]: Finished difference Result 77 states and 104 transitions. [2021-05-06 02:19:36,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 02:19:36,824 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 39 [2021-05-06 02:19:36,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:19:36,828 INFO L225 Difference]: With dead ends: 77 [2021-05-06 02:19:36,828 INFO L226 Difference]: Without dead ends: 75 [2021-05-06 02:19:36,829 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.2ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:19:36,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-05-06 02:19:36,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 71. [2021-05-06 02:19:36,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 43 states have internal predecessors, (51), 24 states have call successors, (24), 8 states have call predecessors, (24), 7 states have return successors, (21), 19 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 02:19:36,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 96 transitions. [2021-05-06 02:19:36,847 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 96 transitions. Word has length 39 [2021-05-06 02:19:36,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:19:36,847 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 96 transitions. [2021-05-06 02:19:36,847 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-05-06 02:19:36,847 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 96 transitions. [2021-05-06 02:19:36,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-06 02:19:36,848 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:19:36,848 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 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, 1] [2021-05-06 02:19:37,057 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:19:37,058 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:19:37,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:19:37,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1085077998, now seen corresponding path program 1 times [2021-05-06 02:19:37,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:19:37,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821851671] [2021-05-06 02:19:37,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:19:37,069 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:19:37,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1778936344] [2021-05-06 02:19:37,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:19:37,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:19:37,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 02:19:37,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:19:37,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:37,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:37,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:37,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:37,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:37,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:37,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:37,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:37,209 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-06 02:19:37,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:19:37,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821851671] [2021-05-06 02:19:37,209 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:19:37,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778936344] [2021-05-06 02:19:37,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778936344] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:19:37,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:19:37,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-06 02:19:37,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381449201] [2021-05-06 02:19:37,210 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 02:19:37,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:19:37,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 02:19:37,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:19:37,210 INFO L87 Difference]: Start difference. First operand 71 states and 96 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 02:19:37,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:19:37,248 INFO L93 Difference]: Finished difference Result 111 states and 137 transitions. [2021-05-06 02:19:37,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 02:19:37,249 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 42 [2021-05-06 02:19:37,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:19:37,249 INFO L225 Difference]: With dead ends: 111 [2021-05-06 02:19:37,250 INFO L226 Difference]: Without dead ends: 97 [2021-05-06 02:19:37,250 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 11.1ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:19:37,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-05-06 02:19:37,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2021-05-06 02:19:37,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 57 states have (on average 1.2105263157894737) internal successors, (69), 61 states have internal predecessors, (69), 26 states have call successors, (26), 13 states have call predecessors, (26), 11 states have return successors, (22), 20 states have call predecessors, (22), 22 states have call successors, (22) [2021-05-06 02:19:37,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 117 transitions. [2021-05-06 02:19:37,258 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 117 transitions. Word has length 42 [2021-05-06 02:19:37,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:19:37,258 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 117 transitions. [2021-05-06 02:19:37,258 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 02:19:37,258 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 117 transitions. [2021-05-06 02:19:37,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-06 02:19:37,259 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:19:37,259 INFO L523 BasicCegarLoop]: trace histogram [4, 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, 1, 1] [2021-05-06 02:19:37,478 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-06 02:19:37,479 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:19:37,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:19:37,479 INFO L82 PathProgramCache]: Analyzing trace with hash 691597660, now seen corresponding path program 1 times [2021-05-06 02:19:37,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:19:37,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581536123] [2021-05-06 02:19:37,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:19:37,489 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:19:37,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1648264865] [2021-05-06 02:19:37,490 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 02:19:37,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:19:37,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 02:19:37,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:19:37,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:37,637 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-05-06 02:19:37,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:19:37,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581536123] [2021-05-06 02:19:37,638 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:19:37,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648264865] [2021-05-06 02:19:37,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648264865] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:19:37,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:19:37,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 02:19:37,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508984396] [2021-05-06 02:19:37,639 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 02:19:37,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:19:37,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 02:19:37,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:19:37,641 INFO L87 Difference]: Start difference. First operand 95 states and 117 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 02:19:37,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:19:37,678 INFO L93 Difference]: Finished difference Result 106 states and 131 transitions. [2021-05-06 02:19:37,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 02:19:37,678 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 42 [2021-05-06 02:19:37,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:19:37,679 INFO L225 Difference]: With dead ends: 106 [2021-05-06 02:19:37,679 INFO L226 Difference]: Without dead ends: 104 [2021-05-06 02:19:37,680 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.8ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:19:37,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-05-06 02:19:37,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2021-05-06 02:19:37,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 60 states have (on average 1.2) internal successors, (72), 66 states have internal predecessors, (72), 30 states have call successors, (30), 14 states have call predecessors, (30), 12 states have return successors, (26), 22 states have call predecessors, (26), 26 states have call successors, (26) [2021-05-06 02:19:37,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 128 transitions. [2021-05-06 02:19:37,688 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 128 transitions. Word has length 42 [2021-05-06 02:19:37,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:19:37,688 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 128 transitions. [2021-05-06 02:19:37,689 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 02:19:37,689 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 128 transitions. [2021-05-06 02:19:37,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-06 02:19:37,689 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:19:37,689 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1] [2021-05-06 02:19:37,890 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:19:37,890 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:19:37,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:19:37,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1376219446, now seen corresponding path program 1 times [2021-05-06 02:19:37,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:19:37,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203575003] [2021-05-06 02:19:37,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:19:37,899 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:19:37,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1886245413] [2021-05-06 02:19:37,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:19:37,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:19:37,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-06 02:19:37,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:19:38,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:38,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:38,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:38,071 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-05-06 02:19:38,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:19:38,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203575003] [2021-05-06 02:19:38,072 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:19:38,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886245413] [2021-05-06 02:19:38,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886245413] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:19:38,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:19:38,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 02:19:38,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886021741] [2021-05-06 02:19:38,073 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:19:38,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:19:38,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:19:38,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:19:38,074 INFO L87 Difference]: Start difference. First operand 103 states and 128 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 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 02:19:38,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:19:38,214 INFO L93 Difference]: Finished difference Result 118 states and 148 transitions. [2021-05-06 02:19:38,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 02:19:38,214 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 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 44 [2021-05-06 02:19:38,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:19:38,216 INFO L225 Difference]: With dead ends: 118 [2021-05-06 02:19:38,216 INFO L226 Difference]: Without dead ends: 106 [2021-05-06 02:19:38,216 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 53.7ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:19:38,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-05-06 02:19:38,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 104. [2021-05-06 02:19:38,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 67 states have internal predecessors, (71), 31 states have call successors, (31), 13 states have call predecessors, (31), 12 states have return successors, (28), 23 states have call predecessors, (28), 28 states have call successors, (28) [2021-05-06 02:19:38,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 130 transitions. [2021-05-06 02:19:38,226 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 130 transitions. Word has length 44 [2021-05-06 02:19:38,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:19:38,227 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 130 transitions. [2021-05-06 02:19:38,227 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 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 02:19:38,227 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 130 transitions. [2021-05-06 02:19:38,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-06 02:19:38,227 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:19:38,227 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 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] [2021-05-06 02:19:38,449 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:19:38,450 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:19:38,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:19:38,450 INFO L82 PathProgramCache]: Analyzing trace with hash -1137310021, now seen corresponding path program 1 times [2021-05-06 02:19:38,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:19:38,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916943272] [2021-05-06 02:19:38,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:19:38,456 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:19:38,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [506380163] [2021-05-06 02:19:38,456 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 02:19:38,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:19:38,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-06 02:19:38,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:19:38,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:38,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:38,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:38,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:38,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:38,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:38,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:38,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:38,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:38,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:38,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:38,620 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-05-06 02:19:38,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:19:38,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916943272] [2021-05-06 02:19:38,621 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:19:38,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506380163] [2021-05-06 02:19:38,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506380163] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:19:38,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:19:38,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 02:19:38,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253463726] [2021-05-06 02:19:38,621 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 02:19:38,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:19:38,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 02:19:38,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:19:38,622 INFO L87 Difference]: Start difference. First operand 104 states and 130 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 02:19:38,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:19:38,739 INFO L93 Difference]: Finished difference Result 131 states and 169 transitions. [2021-05-06 02:19:38,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 02:19:38,740 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 47 [2021-05-06 02:19:38,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:19:38,741 INFO L225 Difference]: With dead ends: 131 [2021-05-06 02:19:38,741 INFO L226 Difference]: Without dead ends: 129 [2021-05-06 02:19:38,741 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 44.1ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:19:38,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-05-06 02:19:38,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 124. [2021-05-06 02:19:38,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 72 states have (on average 1.2083333333333333) internal successors, (87), 79 states have internal predecessors, (87), 37 states have call successors, (37), 15 states have call predecessors, (37), 14 states have return successors, (34), 29 states have call predecessors, (34), 34 states have call successors, (34) [2021-05-06 02:19:38,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 158 transitions. [2021-05-06 02:19:38,751 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 158 transitions. Word has length 47 [2021-05-06 02:19:38,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:19:38,751 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 158 transitions. [2021-05-06 02:19:38,751 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 02:19:38,752 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 158 transitions. [2021-05-06 02:19:38,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-06 02:19:38,752 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:19:38,752 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 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] [2021-05-06 02:19:38,969 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-06 02:19:38,969 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:19:38,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:19:38,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1475439812, now seen corresponding path program 2 times [2021-05-06 02:19:38,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:19:38,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491109786] [2021-05-06 02:19:38,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:19:38,975 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:19:38,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2100023630] [2021-05-06 02:19:38,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:19:39,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:19:39,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:19:39,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-06 02:19:39,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:19:39,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:39,149 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-05-06 02:19:39,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:19:39,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491109786] [2021-05-06 02:19:39,150 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:19:39,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100023630] [2021-05-06 02:19:39,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100023630] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:19:39,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:19:39,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 02:19:39,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233462313] [2021-05-06 02:19:39,150 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:19:39,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:19:39,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:19:39,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:19:39,151 INFO L87 Difference]: Start difference. First operand 124 states and 158 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 02:19:39,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:19:39,287 INFO L93 Difference]: Finished difference Result 151 states and 203 transitions. [2021-05-06 02:19:39,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 02:19:39,287 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 52 [2021-05-06 02:19:39,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:19:39,288 INFO L225 Difference]: With dead ends: 151 [2021-05-06 02:19:39,288 INFO L226 Difference]: Without dead ends: 145 [2021-05-06 02:19:39,288 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 55.6ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:19:39,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-05-06 02:19:39,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-05-06 02:19:39,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 81 states have (on average 1.2345679012345678) internal successors, (100), 90 states have internal predecessors, (100), 48 states have call successors, (48), 16 states have call predecessors, (48), 15 states have return successors, (44), 38 states have call predecessors, (44), 44 states have call successors, (44) [2021-05-06 02:19:39,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 192 transitions. [2021-05-06 02:19:39,299 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 192 transitions. Word has length 52 [2021-05-06 02:19:39,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:19:39,299 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 192 transitions. [2021-05-06 02:19:39,300 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 02:19:39,300 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 192 transitions. [2021-05-06 02:19:39,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-06 02:19:39,300 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:19:39,300 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 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] [2021-05-06 02:19:39,516 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:19:39,517 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:19:39,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:19:39,517 INFO L82 PathProgramCache]: Analyzing trace with hash 220857665, now seen corresponding path program 2 times [2021-05-06 02:19:39,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:19:39,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473968970] [2021-05-06 02:19:39,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:19:39,524 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:19:39,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [853252065] [2021-05-06 02:19:39,524 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 02:19:39,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:19:39,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:19:39,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 02:19:39,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:19:39,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:39,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:39,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:39,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:39,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:39,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:39,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:39,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:39,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:39,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:39,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:39,705 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 12 proven. 47 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-06 02:19:39,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:19:39,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473968970] [2021-05-06 02:19:39,706 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:19:39,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853252065] [2021-05-06 02:19:39,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853252065] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:19:39,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:19:39,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 02:19:39,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208276965] [2021-05-06 02:19:39,707 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 02:19:39,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:19:39,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 02:19:39,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:19:39,709 INFO L87 Difference]: Start difference. First operand 145 states and 192 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-06 02:19:39,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:19:39,763 INFO L93 Difference]: Finished difference Result 199 states and 251 transitions. [2021-05-06 02:19:39,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 02:19:39,763 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) Word has length 61 [2021-05-06 02:19:39,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:19:39,764 INFO L225 Difference]: With dead ends: 199 [2021-05-06 02:19:39,765 INFO L226 Difference]: Without dead ends: 173 [2021-05-06 02:19:39,765 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 18.4ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:19:39,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-05-06 02:19:39,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2021-05-06 02:19:39,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 104 states have (on average 1.1826923076923077) internal successors, (123), 113 states have internal predecessors, (123), 48 states have call successors, (48), 21 states have call predecessors, (48), 20 states have return successors, (44), 38 states have call predecessors, (44), 44 states have call successors, (44) [2021-05-06 02:19:39,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 215 transitions. [2021-05-06 02:19:39,776 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 215 transitions. Word has length 61 [2021-05-06 02:19:39,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:19:39,776 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 215 transitions. [2021-05-06 02:19:39,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-06 02:19:39,777 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 215 transitions. [2021-05-06 02:19:39,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-06 02:19:39,777 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:19:39,777 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 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] [2021-05-06 02:19:39,995 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:19:39,998 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:19:39,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:19:39,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1997533323, now seen corresponding path program 1 times [2021-05-06 02:19:39,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:19:39,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575596846] [2021-05-06 02:19:39,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:19:40,013 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:19:40,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [631596392] [2021-05-06 02:19:40,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:19:40,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:19:40,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 02:19:40,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:19:40,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:40,205 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-05-06 02:19:40,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:19:40,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575596846] [2021-05-06 02:19:40,205 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:19:40,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631596392] [2021-05-06 02:19:40,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631596392] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:19:40,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:19:40,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 02:19:40,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7184453] [2021-05-06 02:19:40,206 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 02:19:40,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:19:40,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 02:19:40,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:19:40,207 INFO L87 Difference]: Start difference. First operand 173 states and 215 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 02:19:40,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:19:40,288 INFO L93 Difference]: Finished difference Result 188 states and 237 transitions. [2021-05-06 02:19:40,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 02:19:40,289 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 61 [2021-05-06 02:19:40,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:19:40,290 INFO L225 Difference]: With dead ends: 188 [2021-05-06 02:19:40,290 INFO L226 Difference]: Without dead ends: 186 [2021-05-06 02:19:40,291 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.4ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:19:40,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-05-06 02:19:40,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 184. [2021-05-06 02:19:40,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 108 states have (on average 1.1851851851851851) internal successors, (128), 118 states have internal predecessors, (128), 54 states have call successors, (54), 22 states have call predecessors, (54), 21 states have return successors, (50), 43 states have call predecessors, (50), 50 states have call successors, (50) [2021-05-06 02:19:40,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 232 transitions. [2021-05-06 02:19:40,308 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 232 transitions. Word has length 61 [2021-05-06 02:19:40,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:19:40,308 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 232 transitions. [2021-05-06 02:19:40,308 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 02:19:40,308 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 232 transitions. [2021-05-06 02:19:40,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-06 02:19:40,309 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:19:40,309 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 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] [2021-05-06 02:19:40,524 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-06 02:19:40,525 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:19:40,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:19:40,525 INFO L82 PathProgramCache]: Analyzing trace with hash 284565575, now seen corresponding path program 2 times [2021-05-06 02:19:40,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:19:40,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100723754] [2021-05-06 02:19:40,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:19:40,531 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:19:40,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [551502571] [2021-05-06 02:19:40,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:19:40,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:19:40,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:19:40,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 02:19:40,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:19:40,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:40,709 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-05-06 02:19:40,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:19:40,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100723754] [2021-05-06 02:19:40,710 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:19:40,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551502571] [2021-05-06 02:19:40,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551502571] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:19:40,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:19:40,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 02:19:40,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059841092] [2021-05-06 02:19:40,710 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 02:19:40,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:19:40,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 02:19:40,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:19:40,711 INFO L87 Difference]: Start difference. First operand 184 states and 232 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 02:19:40,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:19:40,792 INFO L93 Difference]: Finished difference Result 198 states and 252 transitions. [2021-05-06 02:19:40,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 02:19:40,792 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 61 [2021-05-06 02:19:40,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:19:40,793 INFO L225 Difference]: With dead ends: 198 [2021-05-06 02:19:40,794 INFO L226 Difference]: Without dead ends: 193 [2021-05-06 02:19:40,794 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.6ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:19:40,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-05-06 02:19:40,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 192. [2021-05-06 02:19:40,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 112 states have (on average 1.1785714285714286) internal successors, (132), 122 states have internal predecessors, (132), 57 states have call successors, (57), 23 states have call predecessors, (57), 22 states have return successors, (53), 46 states have call predecessors, (53), 53 states have call successors, (53) [2021-05-06 02:19:40,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 242 transitions. [2021-05-06 02:19:40,806 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 242 transitions. Word has length 61 [2021-05-06 02:19:40,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:19:40,806 INFO L480 AbstractCegarLoop]: Abstraction has 192 states and 242 transitions. [2021-05-06 02:19:40,806 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 02:19:40,807 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 242 transitions. [2021-05-06 02:19:40,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-06 02:19:40,807 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:19:40,807 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:19:41,020 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-06 02:19:41,021 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:19:41,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:19:41,021 INFO L82 PathProgramCache]: Analyzing trace with hash 404368620, now seen corresponding path program 2 times [2021-05-06 02:19:41,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:19:41,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661944840] [2021-05-06 02:19:41,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:19:41,026 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:19:41,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1594044338] [2021-05-06 02:19:41,027 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:19:41,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:19:41,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:19:41,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-06 02:19:41,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:19:41,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:41,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:41,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:41,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:41,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:41,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:41,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:41,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:41,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:41,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:41,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:41,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:41,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:41,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:41,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:41,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:41,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:41,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:41,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:41,272 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 28 proven. 22 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-05-06 02:19:41,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:19:41,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661944840] [2021-05-06 02:19:41,273 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:19:41,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594044338] [2021-05-06 02:19:41,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594044338] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:19:41,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:19:41,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 02:19:41,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779245135] [2021-05-06 02:19:41,273 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 02:19:41,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:19:41,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 02:19:41,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-05-06 02:19:41,274 INFO L87 Difference]: Start difference. First operand 192 states and 242 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 10 states have internal predecessors, (29), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 02:19:41,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:19:41,500 INFO L93 Difference]: Finished difference Result 219 states and 281 transitions. [2021-05-06 02:19:41,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 02:19:41,500 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 10 states have internal predecessors, (29), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 66 [2021-05-06 02:19:41,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:19:41,501 INFO L225 Difference]: With dead ends: 219 [2021-05-06 02:19:41,501 INFO L226 Difference]: Without dead ends: 217 [2021-05-06 02:19:41,502 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 89.5ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-05-06 02:19:41,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-05-06 02:19:41,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 212. [2021-05-06 02:19:41,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 124 states have (on average 1.1935483870967742) internal successors, (148), 134 states have internal predecessors, (148), 63 states have call successors, (63), 25 states have call predecessors, (63), 24 states have return successors, (59), 52 states have call predecessors, (59), 59 states have call successors, (59) [2021-05-06 02:19:41,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 270 transitions. [2021-05-06 02:19:41,513 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 270 transitions. Word has length 66 [2021-05-06 02:19:41,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:19:41,513 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 270 transitions. [2021-05-06 02:19:41,513 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 10 states have internal predecessors, (29), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 02:19:41,513 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 270 transitions. [2021-05-06 02:19:41,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-06 02:19:41,514 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:19:41,514 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 3, 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] [2021-05-06 02:19:41,720 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-06 02:19:41,721 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:19:41,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:19:41,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1105968494, now seen corresponding path program 3 times [2021-05-06 02:19:41,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:19:41,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383729129] [2021-05-06 02:19:41,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:19:41,726 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:19:41,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1802758570] [2021-05-06 02:19:41,727 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:19:41,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 02:19:41,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:19:41,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-06 02:19:41,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:19:41,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:41,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:41,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:41,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:41,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:41,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:41,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:41,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:41,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:41,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:41,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:41,955 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-05-06 02:19:41,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:19:41,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383729129] [2021-05-06 02:19:41,955 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:19:41,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802758570] [2021-05-06 02:19:41,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802758570] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:19:41,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:19:41,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 02:19:41,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699848677] [2021-05-06 02:19:41,956 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:19:41,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:19:41,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:19:41,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:19:41,956 INFO L87 Difference]: Start difference. First operand 212 states and 270 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 02:19:42,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:19:42,083 INFO L93 Difference]: Finished difference Result 235 states and 302 transitions. [2021-05-06 02:19:42,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 02:19:42,084 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 66 [2021-05-06 02:19:42,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:19:42,090 INFO L225 Difference]: With dead ends: 235 [2021-05-06 02:19:42,090 INFO L226 Difference]: Without dead ends: 233 [2021-05-06 02:19:42,090 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 55.8ms TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:19:42,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-05-06 02:19:42,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 217. [2021-05-06 02:19:42,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 128 states have (on average 1.1953125) internal successors, (153), 138 states have internal predecessors, (153), 63 states have call successors, (63), 26 states have call predecessors, (63), 25 states have return successors, (59), 52 states have call predecessors, (59), 59 states have call successors, (59) [2021-05-06 02:19:42,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 275 transitions. [2021-05-06 02:19:42,101 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 275 transitions. Word has length 66 [2021-05-06 02:19:42,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:19:42,102 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 275 transitions. [2021-05-06 02:19:42,102 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 02:19:42,102 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 275 transitions. [2021-05-06 02:19:42,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-05-06 02:19:42,102 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:19:42,102 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:19:42,316 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:19:42,317 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:19:42,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:19:42,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1181721515, now seen corresponding path program 4 times [2021-05-06 02:19:42,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:19:42,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887908890] [2021-05-06 02:19:42,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:19:42,322 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:19:42,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [66208016] [2021-05-06 02:19:42,322 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:19:42,370 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 02:19:42,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:19:42,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-06 02:19:42,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:19:42,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:42,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:42,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:42,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:42,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:42,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:42,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:42,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:42,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:42,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:42,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:42,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:42,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:42,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:42,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:42,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:42,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:42,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:42,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:42,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:42,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:42,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:42,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:42,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:42,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:42,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:42,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:42,654 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 47 proven. 25 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-05-06 02:19:42,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:19:42,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887908890] [2021-05-06 02:19:42,655 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:19:42,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66208016] [2021-05-06 02:19:42,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66208016] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:19:42,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:19:42,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 02:19:42,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807416870] [2021-05-06 02:19:42,655 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 02:19:42,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:19:42,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 02:19:42,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-05-06 02:19:42,656 INFO L87 Difference]: Start difference. First operand 217 states and 275 transitions. Second operand has 14 states, 13 states have (on average 2.230769230769231) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-06 02:19:42,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:19:42,938 INFO L93 Difference]: Finished difference Result 242 states and 310 transitions. [2021-05-06 02:19:42,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 02:19:42,938 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.230769230769231) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) Word has length 71 [2021-05-06 02:19:42,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:19:42,939 INFO L225 Difference]: With dead ends: 242 [2021-05-06 02:19:42,939 INFO L226 Difference]: Without dead ends: 235 [2021-05-06 02:19:42,940 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 148.4ms TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-05-06 02:19:42,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-05-06 02:19:42,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 193. [2021-05-06 02:19:42,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 115 states have (on average 1.182608695652174) internal successors, (136), 124 states have internal predecessors, (136), 54 states have call successors, (54), 24 states have call predecessors, (54), 23 states have return successors, (50), 44 states have call predecessors, (50), 50 states have call successors, (50) [2021-05-06 02:19:42,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 240 transitions. [2021-05-06 02:19:42,951 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 240 transitions. Word has length 71 [2021-05-06 02:19:42,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:19:42,951 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 240 transitions. [2021-05-06 02:19:42,951 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 2.230769230769231) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-06 02:19:42,952 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 240 transitions. [2021-05-06 02:19:42,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-05-06 02:19:42,952 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:19:42,952 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:19:43,153 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-06 02:19:43,153 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:19:43,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:19:43,153 INFO L82 PathProgramCache]: Analyzing trace with hash 787354729, now seen corresponding path program 3 times [2021-05-06 02:19:43,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:19:43,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731381548] [2021-05-06 02:19:43,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:19:43,158 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:19:43,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [983191130] [2021-05-06 02:19:43,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:19:43,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 02:19:43,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:19:43,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-06 02:19:43,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:19:43,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:43,366 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 36 proven. 18 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-05-06 02:19:43,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:19:43,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731381548] [2021-05-06 02:19:43,366 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:19:43,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983191130] [2021-05-06 02:19:43,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983191130] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:19:43,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:19:43,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 02:19:43,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016424226] [2021-05-06 02:19:43,367 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 02:19:43,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:19:43,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 02:19:43,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:19:43,367 INFO L87 Difference]: Start difference. First operand 193 states and 240 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 02:19:43,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:19:43,693 INFO L93 Difference]: Finished difference Result 229 states and 292 transitions. [2021-05-06 02:19:43,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 02:19:43,693 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 71 [2021-05-06 02:19:43,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:19:43,694 INFO L225 Difference]: With dead ends: 229 [2021-05-06 02:19:43,695 INFO L226 Difference]: Without dead ends: 222 [2021-05-06 02:19:43,695 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 74.8ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-06 02:19:43,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-05-06 02:19:43,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 217. [2021-05-06 02:19:43,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 130 states have (on average 1.1923076923076923) internal successors, (155), 139 states have internal predecessors, (155), 60 states have call successors, (60), 27 states have call predecessors, (60), 26 states have return successors, (56), 50 states have call predecessors, (56), 56 states have call successors, (56) [2021-05-06 02:19:43,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 271 transitions. [2021-05-06 02:19:43,706 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 271 transitions. Word has length 71 [2021-05-06 02:19:43,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:19:43,707 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 271 transitions. [2021-05-06 02:19:43,707 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 02:19:43,707 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 271 transitions. [2021-05-06 02:19:43,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-06 02:19:43,708 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:19:43,708 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 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] [2021-05-06 02:19:43,920 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-06 02:19:43,921 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:19:43,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:19:43,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1898774094, now seen corresponding path program 3 times [2021-05-06 02:19:43,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:19:43,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364184060] [2021-05-06 02:19:43,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:19:43,926 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:19:43,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [775862686] [2021-05-06 02:19:43,926 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:19:43,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 02:19:43,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:19:43,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 02:19:43,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:19:43,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:43,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:43,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:44,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:44,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:44,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:44,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:44,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:44,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:44,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:44,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:44,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:44,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:44,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:44,086 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 18 proven. 135 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-06 02:19:44,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:19:44,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364184060] [2021-05-06 02:19:44,087 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:19:44,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775862686] [2021-05-06 02:19:44,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775862686] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:19:44,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:19:44,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 02:19:44,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326019959] [2021-05-06 02:19:44,087 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 02:19:44,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:19:44,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 02:19:44,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:19:44,088 INFO L87 Difference]: Start difference. First operand 217 states and 271 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 02:19:44,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:19:44,169 INFO L93 Difference]: Finished difference Result 269 states and 330 transitions. [2021-05-06 02:19:44,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 02:19:44,170 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) Word has length 80 [2021-05-06 02:19:44,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:19:44,171 INFO L225 Difference]: With dead ends: 269 [2021-05-06 02:19:44,171 INFO L226 Difference]: Without dead ends: 243 [2021-05-06 02:19:44,171 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 25.1ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:19:44,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-05-06 02:19:44,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 230. [2021-05-06 02:19:44,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 143 states have (on average 1.1538461538461537) internal successors, (165), 152 states have internal predecessors, (165), 57 states have call successors, (57), 30 states have call predecessors, (57), 29 states have return successors, (53), 47 states have call predecessors, (53), 53 states have call successors, (53) [2021-05-06 02:19:44,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 275 transitions. [2021-05-06 02:19:44,184 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 275 transitions. Word has length 80 [2021-05-06 02:19:44,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:19:44,184 INFO L480 AbstractCegarLoop]: Abstraction has 230 states and 275 transitions. [2021-05-06 02:19:44,184 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 02:19:44,184 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 275 transitions. [2021-05-06 02:19:44,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-06 02:19:44,185 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:19:44,185 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:19:44,396 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:19:44,397 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:19:44,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:19:44,397 INFO L82 PathProgramCache]: Analyzing trace with hash -122098436, now seen corresponding path program 5 times [2021-05-06 02:19:44,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:19:44,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111632094] [2021-05-06 02:19:44,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:19:44,404 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:19:44,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [471295164] [2021-05-06 02:19:44,405 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:19:44,815 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-06 02:19:44,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:19:44,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 02:19:44,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:19:44,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:44,923 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 18 proven. 9 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-05-06 02:19:44,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:19:44,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111632094] [2021-05-06 02:19:44,924 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:19:44,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471295164] [2021-05-06 02:19:44,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471295164] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:19:44,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:19:44,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 02:19:44,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458115907] [2021-05-06 02:19:44,925 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 02:19:44,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:19:44,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 02:19:44,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:19:44,925 INFO L87 Difference]: Start difference. First operand 230 states and 275 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 3 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 02:19:44,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:19:44,993 INFO L93 Difference]: Finished difference Result 266 states and 328 transitions. [2021-05-06 02:19:44,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 02:19:44,993 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 3 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 80 [2021-05-06 02:19:44,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:19:44,994 INFO L225 Difference]: With dead ends: 266 [2021-05-06 02:19:44,994 INFO L226 Difference]: Without dead ends: 264 [2021-05-06 02:19:44,994 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.3ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:19:44,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-05-06 02:19:45,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 250. [2021-05-06 02:19:45,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 152 states have (on average 1.1644736842105263) internal successors, (177), 163 states have internal predecessors, (177), 67 states have call successors, (67), 31 states have call predecessors, (67), 30 states have return successors, (63), 55 states have call predecessors, (63), 63 states have call successors, (63) [2021-05-06 02:19:45,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 307 transitions. [2021-05-06 02:19:45,007 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 307 transitions. Word has length 80 [2021-05-06 02:19:45,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:19:45,008 INFO L480 AbstractCegarLoop]: Abstraction has 250 states and 307 transitions. [2021-05-06 02:19:45,008 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 3 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 02:19:45,008 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 307 transitions. [2021-05-06 02:19:45,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-06 02:19:45,008 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:19:45,009 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:19:45,222 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:19:45,223 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:19:45,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:19:45,223 INFO L82 PathProgramCache]: Analyzing trace with hash -1835066184, now seen corresponding path program 6 times [2021-05-06 02:19:45,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:19:45,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925671050] [2021-05-06 02:19:45,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:19:45,228 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:19:45,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1050273368] [2021-05-06 02:19:45,228 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:19:45,297 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-06 02:19:45,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:19:45,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 02:19:45,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:19:45,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:45,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:45,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:45,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:45,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:45,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:45,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:45,428 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 52 proven. 7 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2021-05-06 02:19:45,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:19:45,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925671050] [2021-05-06 02:19:45,429 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:19:45,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050273368] [2021-05-06 02:19:45,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050273368] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:19:45,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:19:45,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 02:19:45,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877123177] [2021-05-06 02:19:45,455 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 02:19:45,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:19:45,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 02:19:45,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:19:45,456 INFO L87 Difference]: Start difference. First operand 250 states and 307 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-06 02:19:45,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:19:45,523 INFO L93 Difference]: Finished difference Result 256 states and 312 transitions. [2021-05-06 02:19:45,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 02:19:45,524 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 80 [2021-05-06 02:19:45,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:19:45,525 INFO L225 Difference]: With dead ends: 256 [2021-05-06 02:19:45,525 INFO L226 Difference]: Without dead ends: 251 [2021-05-06 02:19:45,525 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 30.7ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:19:45,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-05-06 02:19:45,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 249. [2021-05-06 02:19:45,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 155 states have (on average 1.1548387096774193) internal successors, (179), 164 states have internal predecessors, (179), 62 states have call successors, (62), 32 states have call predecessors, (62), 31 states have return successors, (59), 52 states have call predecessors, (59), 59 states have call successors, (59) [2021-05-06 02:19:45,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 300 transitions. [2021-05-06 02:19:45,540 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 300 transitions. Word has length 80 [2021-05-06 02:19:45,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:19:45,540 INFO L480 AbstractCegarLoop]: Abstraction has 249 states and 300 transitions. [2021-05-06 02:19:45,540 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-06 02:19:45,540 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 300 transitions. [2021-05-06 02:19:45,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-06 02:19:45,541 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:19:45,541 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:19:45,759 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:19:45,759 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:19:45,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:19:45,760 INFO L82 PathProgramCache]: Analyzing trace with hash 629296923, now seen corresponding path program 3 times [2021-05-06 02:19:45,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:19:45,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742235830] [2021-05-06 02:19:45,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:19:45,764 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:19:45,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [662631686] [2021-05-06 02:19:45,764 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:19:45,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 02:19:45,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:19:45,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-06 02:19:45,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:19:45,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:45,999 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 40 proven. 40 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2021-05-06 02:19:45,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:19:46,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742235830] [2021-05-06 02:19:46,000 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:19:46,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662631686] [2021-05-06 02:19:46,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662631686] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:19:46,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:19:46,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 02:19:46,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352913653] [2021-05-06 02:19:46,000 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 02:19:46,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:19:46,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 02:19:46,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:19:46,001 INFO L87 Difference]: Start difference. First operand 249 states and 300 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 5 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 02:19:46,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:19:46,333 INFO L93 Difference]: Finished difference Result 286 states and 358 transitions. [2021-05-06 02:19:46,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 02:19:46,334 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 5 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 85 [2021-05-06 02:19:46,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:19:46,335 INFO L225 Difference]: With dead ends: 286 [2021-05-06 02:19:46,335 INFO L226 Difference]: Without dead ends: 284 [2021-05-06 02:19:46,335 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 74.1ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-06 02:19:46,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-05-06 02:19:46,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 260. [2021-05-06 02:19:46,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 162 states have (on average 1.1604938271604939) internal successors, (188), 171 states have internal predecessors, (188), 65 states have call successors, (65), 33 states have call predecessors, (65), 32 states have return successors, (62), 55 states have call predecessors, (62), 62 states have call successors, (62) [2021-05-06 02:19:46,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 315 transitions. [2021-05-06 02:19:46,348 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 315 transitions. Word has length 85 [2021-05-06 02:19:46,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:19:46,349 INFO L480 AbstractCegarLoop]: Abstraction has 260 states and 315 transitions. [2021-05-06 02:19:46,349 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 5 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 02:19:46,349 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 315 transitions. [2021-05-06 02:19:46,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-06 02:19:46,349 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:19:46,350 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:19:46,563 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-06 02:19:46,563 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:19:46,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:19:46,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1330896797, now seen corresponding path program 7 times [2021-05-06 02:19:46,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:19:46,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444646909] [2021-05-06 02:19:46,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:19:46,568 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:19:46,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2044700847] [2021-05-06 02:19:46,569 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:19:46,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:19:46,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-06 02:19:46,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:19:46,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:46,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:46,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:46,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:46,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:46,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:46,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:46,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:46,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:46,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:46,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:46,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:46,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:46,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:46,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:46,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:46,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:46,868 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 40 proven. 40 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2021-05-06 02:19:46,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:19:46,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444646909] [2021-05-06 02:19:46,869 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:19:46,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044700847] [2021-05-06 02:19:46,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044700847] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:19:46,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:19:46,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 02:19:46,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539578792] [2021-05-06 02:19:46,869 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 02:19:46,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:19:46,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 02:19:46,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:19:46,870 INFO L87 Difference]: Start difference. First operand 260 states and 315 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 5 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 02:19:47,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:19:47,408 INFO L93 Difference]: Finished difference Result 308 states and 376 transitions. [2021-05-06 02:19:47,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 02:19:47,408 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 5 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 85 [2021-05-06 02:19:47,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:19:47,410 INFO L225 Difference]: With dead ends: 308 [2021-05-06 02:19:47,410 INFO L226 Difference]: Without dead ends: 306 [2021-05-06 02:19:47,410 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 111.3ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:19:47,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-05-06 02:19:47,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 301. [2021-05-06 02:19:47,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 189 states have (on average 1.164021164021164) internal successors, (220), 198 states have internal predecessors, (220), 74 states have call successors, (74), 38 states have call predecessors, (74), 37 states have return successors, (71), 64 states have call predecessors, (71), 71 states have call successors, (71) [2021-05-06 02:19:47,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 365 transitions. [2021-05-06 02:19:47,426 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 365 transitions. Word has length 85 [2021-05-06 02:19:47,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:19:47,426 INFO L480 AbstractCegarLoop]: Abstraction has 301 states and 365 transitions. [2021-05-06 02:19:47,426 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 5 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 02:19:47,426 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 365 transitions. [2021-05-06 02:19:47,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-06 02:19:47,427 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:19:47,427 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:19:47,629 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-06 02:19:47,629 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:19:47,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:19:47,629 INFO L82 PathProgramCache]: Analyzing trace with hash 148216665, now seen corresponding path program 8 times [2021-05-06 02:19:47,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:19:47,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205823068] [2021-05-06 02:19:47,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:19:47,634 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:19:47,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [538042494] [2021-05-06 02:19:47,634 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:19:47,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:19:47,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:19:47,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 52 conjunts are in the unsatisfiable core [2021-05-06 02:19:47,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:19:47,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:47,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:47,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:47,913 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 59 proven. 57 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-05-06 02:19:47,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:19:47,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205823068] [2021-05-06 02:19:47,913 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:19:47,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538042494] [2021-05-06 02:19:47,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538042494] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:19:47,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:19:47,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 02:19:47,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955997812] [2021-05-06 02:19:47,914 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 02:19:47,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:19:47,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 02:19:47,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:19:47,914 INFO L87 Difference]: Start difference. First operand 301 states and 365 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 5 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 02:19:48,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:19:48,485 INFO L93 Difference]: Finished difference Result 330 states and 406 transitions. [2021-05-06 02:19:48,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 02:19:48,486 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 5 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 85 [2021-05-06 02:19:48,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:19:48,487 INFO L225 Difference]: With dead ends: 330 [2021-05-06 02:19:48,487 INFO L226 Difference]: Without dead ends: 328 [2021-05-06 02:19:48,488 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 73 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 98.6ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-06 02:19:48,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-05-06 02:19:48,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 282. [2021-05-06 02:19:48,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 176 states have (on average 1.1704545454545454) internal successors, (206), 185 states have internal predecessors, (206), 71 states have call successors, (71), 35 states have call predecessors, (71), 34 states have return successors, (68), 61 states have call predecessors, (68), 68 states have call successors, (68) [2021-05-06 02:19:48,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 345 transitions. [2021-05-06 02:19:48,505 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 345 transitions. Word has length 85 [2021-05-06 02:19:48,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:19:48,505 INFO L480 AbstractCegarLoop]: Abstraction has 282 states and 345 transitions. [2021-05-06 02:19:48,505 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 5 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 02:19:48,505 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 345 transitions. [2021-05-06 02:19:48,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-06 02:19:48,506 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:19:48,506 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:19:48,713 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:19:48,713 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:19:48,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:19:48,713 INFO L82 PathProgramCache]: Analyzing trace with hash 849816539, now seen corresponding path program 9 times [2021-05-06 02:19:48,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:19:48,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761326090] [2021-05-06 02:19:48,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:19:48,718 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:19:48,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [501646576] [2021-05-06 02:19:48,719 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:19:48,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 02:19:48,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:19:48,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-06 02:19:48,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:19:48,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:48,949 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 70 proven. 14 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-05-06 02:19:48,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:19:48,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761326090] [2021-05-06 02:19:48,949 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:19:48,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501646576] [2021-05-06 02:19:48,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501646576] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:19:48,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:19:48,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 02:19:48,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929829363] [2021-05-06 02:19:48,950 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 02:19:48,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:19:48,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 02:19:48,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:19:48,953 INFO L87 Difference]: Start difference. First operand 282 states and 345 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 02:19:49,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:19:49,437 INFO L93 Difference]: Finished difference Result 346 states and 441 transitions. [2021-05-06 02:19:49,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 02:19:49,437 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 85 [2021-05-06 02:19:49,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:19:49,439 INFO L225 Difference]: With dead ends: 346 [2021-05-06 02:19:49,439 INFO L226 Difference]: Without dead ends: 340 [2021-05-06 02:19:49,439 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 95.4ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:19:49,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-05-06 02:19:49,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 298. [2021-05-06 02:19:49,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 185 states have (on average 1.1675675675675676) internal successors, (216), 195 states have internal predecessors, (216), 76 states have call successors, (76), 37 states have call predecessors, (76), 36 states have return successors, (72), 65 states have call predecessors, (72), 72 states have call successors, (72) [2021-05-06 02:19:49,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 364 transitions. [2021-05-06 02:19:49,467 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 364 transitions. Word has length 85 [2021-05-06 02:19:49,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:19:49,469 INFO L480 AbstractCegarLoop]: Abstraction has 298 states and 364 transitions. [2021-05-06 02:19:49,469 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 02:19:49,469 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 364 transitions. [2021-05-06 02:19:49,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-06 02:19:49,470 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:19:49,470 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:19:49,680 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-06 02:19:49,681 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:19:49,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:19:49,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1358919972, now seen corresponding path program 10 times [2021-05-06 02:19:49,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:19:49,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368809796] [2021-05-06 02:19:49,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:19:49,686 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:19:49,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1274731842] [2021-05-06 02:19:49,687 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:19:49,746 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 02:19:49,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:19:49,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-06 02:19:49,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:19:49,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:49,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:49,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:49,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:49,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:49,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:49,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:49,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:49,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:49,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:49,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:49,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:49,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:49,960 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 27 proven. 61 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2021-05-06 02:19:49,961 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:19:49,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368809796] [2021-05-06 02:19:49,961 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:19:49,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274731842] [2021-05-06 02:19:49,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274731842] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:19:49,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:19:49,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 02:19:49,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065323792] [2021-05-06 02:19:49,962 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 02:19:49,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:19:49,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 02:19:49,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:19:49,964 INFO L87 Difference]: Start difference. First operand 298 states and 364 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-06 02:19:50,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:19:50,363 INFO L93 Difference]: Finished difference Result 325 states and 409 transitions. [2021-05-06 02:19:50,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 02:19:50,364 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 90 [2021-05-06 02:19:50,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:19:50,365 INFO L225 Difference]: With dead ends: 325 [2021-05-06 02:19:50,365 INFO L226 Difference]: Without dead ends: 316 [2021-05-06 02:19:50,365 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 95.5ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:19:50,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-05-06 02:19:50,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 314. [2021-05-06 02:19:50,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 194 states have (on average 1.175257731958763) internal successors, (228), 204 states have internal predecessors, (228), 82 states have call successors, (82), 38 states have call predecessors, (82), 37 states have return successors, (78), 71 states have call predecessors, (78), 78 states have call successors, (78) [2021-05-06 02:19:50,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 388 transitions. [2021-05-06 02:19:50,388 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 388 transitions. Word has length 90 [2021-05-06 02:19:50,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:19:50,388 INFO L480 AbstractCegarLoop]: Abstraction has 314 states and 388 transitions. [2021-05-06 02:19:50,388 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-06 02:19:50,388 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 388 transitions. [2021-05-06 02:19:50,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-06 02:19:50,389 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:19:50,389 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:19:50,596 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:19:50,597 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:19:50,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:19:50,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1753286758, now seen corresponding path program 11 times [2021-05-06 02:19:50,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:19:50,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908451506] [2021-05-06 02:19:50,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:19:50,602 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:19:50,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [611581513] [2021-05-06 02:19:50,602 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:19:51,727 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-06 02:19:51,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:19:51,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-06 02:19:51,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:19:51,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:51,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:51,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:51,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:51,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:51,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:51,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:51,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:51,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:51,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:51,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:51,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:51,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:51,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:51,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:51,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:51,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:51,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:51,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:51,941 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 22 proven. 36 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2021-05-06 02:19:51,941 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:19:51,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908451506] [2021-05-06 02:19:51,941 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:19:51,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611581513] [2021-05-06 02:19:51,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611581513] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:19:51,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:19:51,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 02:19:51,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142997828] [2021-05-06 02:19:51,942 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 02:19:51,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:19:51,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 02:19:51,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:19:51,942 INFO L87 Difference]: Start difference. First operand 314 states and 388 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-06 02:19:52,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:19:52,392 INFO L93 Difference]: Finished difference Result 359 states and 449 transitions. [2021-05-06 02:19:52,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 02:19:52,397 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 90 [2021-05-06 02:19:52,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:19:52,398 INFO L225 Difference]: With dead ends: 359 [2021-05-06 02:19:52,399 INFO L226 Difference]: Without dead ends: 353 [2021-05-06 02:19:52,399 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 75.2ms TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:19:52,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-05-06 02:19:52,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 337. [2021-05-06 02:19:52,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 209 states have (on average 1.167464114832536) internal successors, (244), 220 states have internal predecessors, (244), 87 states have call successors, (87), 41 states have call predecessors, (87), 40 states have return successors, (83), 75 states have call predecessors, (83), 83 states have call successors, (83) [2021-05-06 02:19:52,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 414 transitions. [2021-05-06 02:19:52,420 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 414 transitions. Word has length 90 [2021-05-06 02:19:52,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:19:52,420 INFO L480 AbstractCegarLoop]: Abstraction has 337 states and 414 transitions. [2021-05-06 02:19:52,421 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-06 02:19:52,421 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 414 transitions. [2021-05-06 02:19:52,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-06 02:19:52,422 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:19:52,422 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:19:52,629 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-06 02:19:52,629 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:19:52,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:19:52,630 INFO L82 PathProgramCache]: Analyzing trace with hash 27865438, now seen corresponding path program 12 times [2021-05-06 02:19:52,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:19:52,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890418602] [2021-05-06 02:19:52,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:19:52,635 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:19:52,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [109300863] [2021-05-06 02:19:52,635 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:19:52,710 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-06 02:19:52,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:19:52,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-06 02:19:52,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:19:52,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:52,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:52,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:19:52,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:05,597 WARN L205 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2021-05-06 02:20:05,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:05,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:05,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:05,626 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 67 proven. 56 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-05-06 02:20:05,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:20:05,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890418602] [2021-05-06 02:20:05,627 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:20:05,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109300863] [2021-05-06 02:20:05,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109300863] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:20:05,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:20:05,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 02:20:05,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589232809] [2021-05-06 02:20:05,627 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 02:20:05,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:20:05,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 02:20:05,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:20:05,628 INFO L87 Difference]: Start difference. First operand 337 states and 414 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 02:20:35,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:20:35,139 INFO L93 Difference]: Finished difference Result 401 states and 512 transitions. [2021-05-06 02:20:35,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 02:20:35,139 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) Word has length 90 [2021-05-06 02:20:35,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:20:35,141 INFO L225 Difference]: With dead ends: 401 [2021-05-06 02:20:35,141 INFO L226 Difference]: Without dead ends: 383 [2021-05-06 02:20:35,141 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 12784.0ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:20:35,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-05-06 02:20:35,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 374. [2021-05-06 02:20:35,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 234 states have (on average 1.1837606837606838) internal successors, (277), 243 states have internal predecessors, (277), 97 states have call successors, (97), 43 states have call predecessors, (97), 42 states have return successors, (93), 87 states have call predecessors, (93), 93 states have call successors, (93) [2021-05-06 02:20:35,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 467 transitions. [2021-05-06 02:20:35,167 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 467 transitions. Word has length 90 [2021-05-06 02:20:35,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:20:35,167 INFO L480 AbstractCegarLoop]: Abstraction has 374 states and 467 transitions. [2021-05-06 02:20:35,167 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 02:20:35,167 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 467 transitions. [2021-05-06 02:20:35,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-05-06 02:20:35,168 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:20:35,168 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:20:35,388 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-06 02:20:35,389 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:20:35,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:20:35,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1449122399, now seen corresponding path program 4 times [2021-05-06 02:20:35,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:20:35,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300572963] [2021-05-06 02:20:35,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:20:35,407 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:20:35,408 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [324356720] [2021-05-06 02:20:35,408 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:20:35,478 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 02:20:35,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:20:35,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 02:20:35,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:20:35,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:35,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:35,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:35,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:35,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:35,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:35,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:35,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:35,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:35,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:35,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:35,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:35,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:35,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:35,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:35,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:35,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:35,627 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 24 proven. 266 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-06 02:20:35,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:20:35,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300572963] [2021-05-06 02:20:35,628 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:20:35,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324356720] [2021-05-06 02:20:35,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324356720] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:20:35,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:20:35,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 02:20:35,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905261141] [2021-05-06 02:20:35,628 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:20:35,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:20:35,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:20:35,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:20:35,629 INFO L87 Difference]: Start difference. First operand 374 states and 467 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (17), 7 states have call predecessors, (17), 5 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-06 02:20:35,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:20:35,731 INFO L93 Difference]: Finished difference Result 490 states and 592 transitions. [2021-05-06 02:20:35,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 02:20:35,732 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (17), 7 states have call predecessors, (17), 5 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) Word has length 99 [2021-05-06 02:20:35,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:20:35,733 INFO L225 Difference]: With dead ends: 490 [2021-05-06 02:20:35,734 INFO L226 Difference]: Without dead ends: 460 [2021-05-06 02:20:35,734 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 39.4ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-05-06 02:20:35,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-05-06 02:20:35,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 432. [2021-05-06 02:20:35,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 280 states have (on average 1.1392857142857142) internal successors, (319), 290 states have internal predecessors, (319), 97 states have call successors, (97), 55 states have call predecessors, (97), 54 states have return successors, (93), 86 states have call predecessors, (93), 93 states have call successors, (93) [2021-05-06 02:20:35,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 509 transitions. [2021-05-06 02:20:35,760 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 509 transitions. Word has length 99 [2021-05-06 02:20:35,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:20:35,761 INFO L480 AbstractCegarLoop]: Abstraction has 432 states and 509 transitions. [2021-05-06 02:20:35,761 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (17), 7 states have call predecessors, (17), 5 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-06 02:20:35,761 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 509 transitions. [2021-05-06 02:20:35,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-06 02:20:35,762 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:20:35,762 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:20:35,980 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-06 02:20:35,981 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:20:35,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:20:35,981 INFO L82 PathProgramCache]: Analyzing trace with hash 340347020, now seen corresponding path program 4 times [2021-05-06 02:20:35,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:20:35,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610034826] [2021-05-06 02:20:35,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:20:35,986 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:20:35,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1529972932] [2021-05-06 02:20:35,986 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:20:36,043 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 02:20:36,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:20:36,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 57 conjunts are in the unsatisfiable core [2021-05-06 02:20:36,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:20:36,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:36,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:36,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:36,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:36,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:36,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:36,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:36,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:36,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:36,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:36,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:36,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:36,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:36,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:36,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:36,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:36,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:36,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:36,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:36,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:36,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:36,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:36,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:36,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:36,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:36,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:36,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:36,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:36,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:36,489 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 70 proven. 122 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2021-05-06 02:20:36,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:20:36,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610034826] [2021-05-06 02:20:36,490 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:20:36,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529972932] [2021-05-06 02:20:36,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529972932] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:20:36,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:20:36,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 02:20:36,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728515647] [2021-05-06 02:20:36,490 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 02:20:36,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:20:36,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 02:20:36,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-05-06 02:20:36,492 INFO L87 Difference]: Start difference. First operand 432 states and 509 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2021-05-06 02:20:37,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:20:37,141 INFO L93 Difference]: Finished difference Result 469 states and 567 transitions. [2021-05-06 02:20:37,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 02:20:37,141 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) Word has length 104 [2021-05-06 02:20:37,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:20:37,143 INFO L225 Difference]: With dead ends: 469 [2021-05-06 02:20:37,143 INFO L226 Difference]: Without dead ends: 467 [2021-05-06 02:20:37,144 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 90 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 222.1ms TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-05-06 02:20:37,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2021-05-06 02:20:37,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 443. [2021-05-06 02:20:37,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 287 states have (on average 1.1428571428571428) internal successors, (328), 297 states have internal predecessors, (328), 100 states have call successors, (100), 56 states have call predecessors, (100), 55 states have return successors, (96), 89 states have call predecessors, (96), 96 states have call successors, (96) [2021-05-06 02:20:37,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 524 transitions. [2021-05-06 02:20:37,172 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 524 transitions. Word has length 104 [2021-05-06 02:20:37,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:20:37,173 INFO L480 AbstractCegarLoop]: Abstraction has 443 states and 524 transitions. [2021-05-06 02:20:37,173 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2021-05-06 02:20:37,173 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 524 transitions. [2021-05-06 02:20:37,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-06 02:20:37,174 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:20:37,174 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:20:37,388 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:20:37,389 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:20:37,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:20:37,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1041946894, now seen corresponding path program 13 times [2021-05-06 02:20:37,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:20:37,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812181306] [2021-05-06 02:20:37,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:20:37,395 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:20:37,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1417792434] [2021-05-06 02:20:37,395 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:20:37,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:20:37,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-06 02:20:37,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:20:37,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:37,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:37,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:37,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:37,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:37,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:37,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:37,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:37,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:37,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:37,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:37,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:37,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:37,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:37,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:37,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:37,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:37,758 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 26 proven. 58 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2021-05-06 02:20:37,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:20:37,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812181306] [2021-05-06 02:20:37,759 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:20:37,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417792434] [2021-05-06 02:20:37,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417792434] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:20:37,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:20:37,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 02:20:37,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876461] [2021-05-06 02:20:37,760 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 02:20:37,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:20:37,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 02:20:37,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:20:37,761 INFO L87 Difference]: Start difference. First operand 443 states and 524 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-06 02:20:38,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:20:38,039 INFO L93 Difference]: Finished difference Result 472 states and 565 transitions. [2021-05-06 02:20:38,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 02:20:38,039 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 104 [2021-05-06 02:20:38,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:20:38,041 INFO L225 Difference]: With dead ends: 472 [2021-05-06 02:20:38,041 INFO L226 Difference]: Without dead ends: 470 [2021-05-06 02:20:38,041 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 105.2ms TimeCoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:20:38,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2021-05-06 02:20:38,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 454. [2021-05-06 02:20:38,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 294 states have (on average 1.1428571428571428) internal successors, (336), 304 states have internal predecessors, (336), 103 states have call successors, (103), 57 states have call predecessors, (103), 56 states have return successors, (99), 92 states have call predecessors, (99), 99 states have call successors, (99) [2021-05-06 02:20:38,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 538 transitions. [2021-05-06 02:20:38,080 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 538 transitions. Word has length 104 [2021-05-06 02:20:38,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:20:38,080 INFO L480 AbstractCegarLoop]: Abstraction has 454 states and 538 transitions. [2021-05-06 02:20:38,080 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-06 02:20:38,080 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 538 transitions. [2021-05-06 02:20:38,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-06 02:20:38,081 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:20:38,081 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:20:38,296 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-05-06 02:20:38,297 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:20:38,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:20:38,297 INFO L82 PathProgramCache]: Analyzing trace with hash -140733238, now seen corresponding path program 14 times [2021-05-06 02:20:38,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:20:38,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262784223] [2021-05-06 02:20:38,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:20:38,302 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:20:38,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1125777927] [2021-05-06 02:20:38,302 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:20:38,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:20:38,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:20:38,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 53 conjunts are in the unsatisfiable core [2021-05-06 02:20:38,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:20:38,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:38,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:38,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:38,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:38,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:38,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:38,626 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 84 proven. 66 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2021-05-06 02:20:38,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:20:38,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262784223] [2021-05-06 02:20:38,627 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:20:38,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125777927] [2021-05-06 02:20:38,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125777927] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:20:38,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:20:38,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 02:20:38,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596916168] [2021-05-06 02:20:38,628 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 02:20:38,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:20:38,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 02:20:38,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:20:38,629 INFO L87 Difference]: Start difference. First operand 454 states and 538 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-06 02:20:39,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:20:39,456 INFO L93 Difference]: Finished difference Result 497 states and 591 transitions. [2021-05-06 02:20:39,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 02:20:39,456 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 104 [2021-05-06 02:20:39,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:20:39,458 INFO L225 Difference]: With dead ends: 497 [2021-05-06 02:20:39,458 INFO L226 Difference]: Without dead ends: 495 [2021-05-06 02:20:39,458 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 92 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 115.0ms TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:20:39,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-05-06 02:20:39,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 460. [2021-05-06 02:20:39,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 300 states have (on average 1.1433333333333333) internal successors, (343), 308 states have internal predecessors, (343), 101 states have call successors, (101), 59 states have call predecessors, (101), 58 states have return successors, (97), 92 states have call predecessors, (97), 97 states have call successors, (97) [2021-05-06 02:20:39,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 541 transitions. [2021-05-06 02:20:39,486 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 541 transitions. Word has length 104 [2021-05-06 02:20:39,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:20:39,487 INFO L480 AbstractCegarLoop]: Abstraction has 460 states and 541 transitions. [2021-05-06 02:20:39,487 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-06 02:20:39,487 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 541 transitions. [2021-05-06 02:20:39,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-06 02:20:39,487 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:20:39,488 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:20:39,700 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:20:39,700 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:20:39,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:20:39,701 INFO L82 PathProgramCache]: Analyzing trace with hash 560866636, now seen corresponding path program 15 times [2021-05-06 02:20:39,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:20:39,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988937603] [2021-05-06 02:20:39,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:20:39,705 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:20:39,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [995773411] [2021-05-06 02:20:39,706 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:20:40,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 02:20:40,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:20:40,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-06 02:20:40,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:20:40,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:40,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:40,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:40,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:40,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:40,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:40,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:40,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:40,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:40,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:40,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:40,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:40,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:40,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:40,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:40,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:40,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:40,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:40,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:40,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:40,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:40,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:40,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:40,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:40,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:40,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:40,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:40,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:40,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:40,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:40,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:40,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:40,586 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-05-06 02:20:40,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:40,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:52,298 WARN L205 SmtUtils]: Spent 6.40 s on a formula simplification that was a NOOP. DAG size: 40 [2021-05-06 02:20:52,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:52,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:52,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:52,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:52,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:52,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:52,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:52,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:52,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:52,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:52,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:52,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:52,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:52,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:52,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:52,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:52,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:53,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:53,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:53,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:53,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:53,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:53,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:53,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:53,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:20:53,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:26,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:26,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:26,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:26,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:26,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:26,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:26,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:26,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:26,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:26,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:26,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:26,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:26,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:26,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:26,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:26,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:26,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:26,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:26,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:26,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:26,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:26,743 WARN L159 QuantifierPusher]: Ignoring assumption.