/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/cohendiv-ll_unwindbound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 01:34:54,151 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 01:34:54,154 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 01:34:54,192 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 01:34:54,210 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 01:34:54,212 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 01:34:54,213 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 01:34:54,214 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 01:34:54,216 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 01:34:54,217 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 01:34:54,219 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 01:34:54,224 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 01:34:54,226 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 01:34:54,227 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 01:34:54,228 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 01:34:54,229 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 01:34:54,235 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 01:34:54,244 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 01:34:54,254 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 01:34:54,255 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 01:34:54,256 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 01:34:54,274 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 01:34:54,274 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 01:34:54,275 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 01:34:54,275 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 01:34:54,275 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 01:34:54,276 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 01:34:54,276 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 01:34:54,276 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 01:34:54,276 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 01:34:54,276 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 01:34:54,276 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 01:34:54,277 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 01:34:54,277 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 01:34:54,277 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 01:34:54,277 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 01:34:54,277 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 01:34:54,277 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 01:34:54,278 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 01:34:54,278 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 01:34:54,278 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 01:34:54,278 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 01:34:54,278 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 01:34:54,278 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 01:34:54,279 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 01:34:54,279 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 01:34:54,279 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 01:34:54,279 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 01:34:54,279 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 01:34:54,279 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 01:34:54,576 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 01:34:54,598 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 01:34:54,601 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 01:34:54,601 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 01:34:54,602 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 01:34:54,603 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_unwindbound10.c [2021-05-06 01:34:54,677 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d46e289e4/e7b50997d5974ff7b6868171d680abc5/FLAG7965442f3 [2021-05-06 01:34:55,108 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 01:34:55,108 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_unwindbound10.c [2021-05-06 01:34:55,114 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d46e289e4/e7b50997d5974ff7b6868171d680abc5/FLAG7965442f3 [2021-05-06 01:34:55,497 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d46e289e4/e7b50997d5974ff7b6868171d680abc5 [2021-05-06 01:34:55,499 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 01:34:55,501 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 01:34:55,504 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 01:34:55,505 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 01:34:55,508 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 01:34:55,509 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 01:34:55" (1/1) ... [2021-05-06 01:34:55,510 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@602deadb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:34:55, skipping insertion in model container [2021-05-06 01:34:55,510 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 01:34:55" (1/1) ... [2021-05-06 01:34:55,519 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 01:34:55,533 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 01:34:55,639 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/cohendiv-ll_unwindbound10.c[576,589] [2021-05-06 01:34:55,660 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 01:34:55,668 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 01:34:55,681 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/cohendiv-ll_unwindbound10.c[576,589] [2021-05-06 01:34:55,701 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 01:34:55,714 INFO L208 MainTranslator]: Completed translation [2021-05-06 01:34:55,715 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:34:55 WrapperNode [2021-05-06 01:34:55,715 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 01:34:55,718 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 01:34:55,718 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 01:34:55,719 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 01:34:55,728 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:34:55" (1/1) ... [2021-05-06 01:34:55,729 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:34:55" (1/1) ... [2021-05-06 01:34:55,735 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:34:55" (1/1) ... [2021-05-06 01:34:55,735 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:34:55" (1/1) ... [2021-05-06 01:34:55,746 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:34:55" (1/1) ... [2021-05-06 01:34:55,751 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:34:55" (1/1) ... [2021-05-06 01:34:55,755 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:34:55" (1/1) ... [2021-05-06 01:34:55,759 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 01:34:55,760 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 01:34:55,760 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 01:34:55,760 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 01:34:55,760 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:34:55" (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 01:34:55,877 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 01:34:55,878 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 01:34:55,878 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 01:34:55,878 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 01:34:55,878 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 01:34:55,878 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 01:34:55,879 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 01:34:55,879 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 01:34:55,879 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 01:34:55,879 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 01:34:55,879 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 01:34:55,880 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 01:34:55,880 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 01:34:55,880 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 01:34:55,881 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 01:34:55,881 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 01:34:55,881 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 01:34:55,881 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 01:34:55,881 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 01:34:55,881 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 01:34:56,152 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 01:34:56,152 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 01:34:56,153 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 01:34:56 BoogieIcfgContainer [2021-05-06 01:34:56,153 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 01:34:56,155 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 01:34:56,155 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 01:34:56,157 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 01:34:56,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 01:34:55" (1/3) ... [2021-05-06 01:34:56,158 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dde4e82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 01:34:56, skipping insertion in model container [2021-05-06 01:34:56,158 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:34:55" (2/3) ... [2021-05-06 01:34:56,158 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dde4e82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 01:34:56, skipping insertion in model container [2021-05-06 01:34:56,158 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 01:34:56" (3/3) ... [2021-05-06 01:34:56,159 INFO L111 eAbstractionObserver]: Analyzing ICFG cohendiv-ll_unwindbound10.c [2021-05-06 01:34:56,163 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 01:34:56,174 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 01:34:56,190 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 01:34:56,214 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 01:34:56,214 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 01:34:56,214 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 01:34:56,214 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 01:34:56,214 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 01:34:56,214 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 01:34:56,214 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 01:34:56,221 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 01:34:56,240 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 01:34:56,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 01:34:56,244 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:34:56,244 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 01:34:56,245 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:34:56,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:34:56,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1588022502, now seen corresponding path program 1 times [2021-05-06 01:34:56,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:34:56,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271999143] [2021-05-06 01:34:56,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:34:56,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:34:56,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 01:34:56,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:34:56,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 01:34:56,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:34:56,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 01:34:56,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 01:34:56,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271999143] [2021-05-06 01:34:56,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271999143] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 01:34:56,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 01:34:56,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 01:34:56,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114921690] [2021-05-06 01:34:56,429 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 01:34:56,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 01:34:56,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 01:34:56,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 01:34:56,441 INFO L87 Difference]: Start difference. First operand has 38 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 01:34:56,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 01:34:56,541 INFO L93 Difference]: Finished difference Result 68 states and 101 transitions. [2021-05-06 01:34:56,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 01:34:56,543 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-06 01:34:56,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 01:34:56,549 INFO L225 Difference]: With dead ends: 68 [2021-05-06 01:34:56,549 INFO L226 Difference]: Without dead ends: 34 [2021-05-06 01:34:56,552 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 01:34:56,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-06 01:34:56,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2021-05-06 01:34:56,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 19 states have (on average 1.263157894736842) internal successors, (24), 20 states have internal predecessors, (24), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 01:34:56,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2021-05-06 01:34:56,586 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 17 [2021-05-06 01:34:56,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 01:34:56,586 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2021-05-06 01:34:56,587 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 01:34:56,587 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2021-05-06 01:34:56,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 01:34:56,587 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:34:56,588 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 01:34:56,588 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 01:34:56,588 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:34:56,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:34:56,589 INFO L82 PathProgramCache]: Analyzing trace with hash 766070672, now seen corresponding path program 1 times [2021-05-06 01:34:56,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:34:56,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380071367] [2021-05-06 01:34:56,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:34:56,622 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 01:34:56,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1795539033] [2021-05-06 01:34:56,623 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 01:34:56,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:34:56,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 01:34:56,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 01:34:56,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:34:56,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:34:56,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:34:56,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:34:56,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:34:56,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 01:34:56,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 01:34:56,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380071367] [2021-05-06 01:34:56,854 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 01:34:56,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795539033] [2021-05-06 01:34:56,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795539033] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 01:34:56,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 01:34:56,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 01:34:56,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041860583] [2021-05-06 01:34:56,857 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 01:34:56,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 01:34:56,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 01:34:56,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 01:34:56,858 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 01:34:56,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 01:34:56,883 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2021-05-06 01:34:56,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 01:34:56,883 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2021-05-06 01:34:56,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 01:34:56,885 INFO L225 Difference]: With dead ends: 42 [2021-05-06 01:34:56,885 INFO L226 Difference]: Without dead ends: 35 [2021-05-06 01:34:56,887 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.8ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 01:34:56,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-06 01:34:56,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-06 01:34:56,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 22 states have internal predecessors, (26), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 01:34:56,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2021-05-06 01:34:56,906 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 18 [2021-05-06 01:34:56,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 01:34:56,907 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2021-05-06 01:34:56,908 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 01:34:56,908 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2021-05-06 01:34:56,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 01:34:56,909 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:34:56,914 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 01:34:57,140 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 01:34:57,140 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:34:57,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:34:57,141 INFO L82 PathProgramCache]: Analyzing trace with hash 767560222, now seen corresponding path program 1 times [2021-05-06 01:34:57,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:34:57,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445256581] [2021-05-06 01:34:57,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:34:57,158 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 01:34:57,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [994573869] [2021-05-06 01:34:57,158 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 01:34:57,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:34:57,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 01:34:57,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 01:34:57,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:34:57,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:34:57,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:34:57,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 01:34:57,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 01:34:57,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445256581] [2021-05-06 01:34:57,358 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 01:34:57,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994573869] [2021-05-06 01:34:57,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994573869] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 01:34:57,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 01:34:57,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-06 01:34:57,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264294905] [2021-05-06 01:34:57,359 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 01:34:57,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 01:34:57,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 01:34:57,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 01:34:57,361 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 8 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 01:34:57,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 01:34:57,470 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2021-05-06 01:34:57,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 01:34:57,471 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-06 01:34:57,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 01:34:57,473 INFO L225 Difference]: With dead ends: 45 [2021-05-06 01:34:57,473 INFO L226 Difference]: Without dead ends: 43 [2021-05-06 01:34:57,474 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 46.5ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-06 01:34:57,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-06 01:34:57,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2021-05-06 01:34:57,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 26 states have internal predecessors, (29), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 01:34:57,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2021-05-06 01:34:57,485 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 18 [2021-05-06 01:34:57,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 01:34:57,486 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2021-05-06 01:34:57,486 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 01:34:57,486 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2021-05-06 01:34:57,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 01:34:57,486 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:34:57,487 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 01:34:57,696 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 01:34:57,705 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:34:57,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:34:57,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1016228092, now seen corresponding path program 1 times [2021-05-06 01:34:57,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:34:57,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604052454] [2021-05-06 01:34:57,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:34:57,721 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 01:34:57,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [73046556] [2021-05-06 01:34:57,722 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 01:34:57,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:34:57,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 01:34:57,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 01:34:57,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:34:57,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:34:57,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:34:57,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:34:57,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:34:57,882 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 01:34:57,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 01:34:57,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604052454] [2021-05-06 01:34:57,882 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 01:34:57,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73046556] [2021-05-06 01:34:57,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73046556] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 01:34:57,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 01:34:57,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-06 01:34:57,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485421929] [2021-05-06 01:34:57,883 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 01:34:57,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 01:34:57,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 01:34:57,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 01:34:57,884 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 01:34:57,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 01:34:57,982 INFO L93 Difference]: Finished difference Result 58 states and 74 transitions. [2021-05-06 01:34:57,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 01:34:57,983 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-06 01:34:57,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 01:34:57,985 INFO L225 Difference]: With dead ends: 58 [2021-05-06 01:34:57,985 INFO L226 Difference]: Without dead ends: 55 [2021-05-06 01:34:57,988 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 37.9ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-06 01:34:57,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-06 01:34:58,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2021-05-06 01:34:58,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 32 states have (on average 1.21875) internal successors, (39), 33 states have internal predecessors, (39), 16 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-06 01:34:58,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions. [2021-05-06 01:34:58,005 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 23 [2021-05-06 01:34:58,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 01:34:58,005 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions. [2021-05-06 01:34:58,006 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 01:34:58,006 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2021-05-06 01:34:58,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-06 01:34:58,007 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:34:58,007 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 01:34:58,220 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 01:34:58,221 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:34:58,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:34:58,221 INFO L82 PathProgramCache]: Analyzing trace with hash 2019703110, now seen corresponding path program 1 times [2021-05-06 01:34:58,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:34:58,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628743279] [2021-05-06 01:34:58,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:34:58,246 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 01:34:58,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [568735471] [2021-05-06 01:34:58,246 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 01:34:58,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:34:58,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 01:34:58,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 01:34:58,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:34:58,390 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 01:34:58,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 01:34:58,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628743279] [2021-05-06 01:34:58,391 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 01:34:58,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568735471] [2021-05-06 01:34:58,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568735471] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 01:34:58,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 01:34:58,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 01:34:58,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274829469] [2021-05-06 01:34:58,391 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 01:34:58,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 01:34:58,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 01:34:58,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 01:34:58,392 INFO L87 Difference]: Start difference. First operand 54 states and 69 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 01:34:58,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 01:34:58,461 INFO L93 Difference]: Finished difference Result 83 states and 113 transitions. [2021-05-06 01:34:58,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 01:34:58,461 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 31 [2021-05-06 01:34:58,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 01:34:58,463 INFO L225 Difference]: With dead ends: 83 [2021-05-06 01:34:58,463 INFO L226 Difference]: Without dead ends: 81 [2021-05-06 01:34:58,464 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.6ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 01:34:58,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-05-06 01:34:58,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2021-05-06 01:34:58,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 44 states have (on average 1.2727272727272727) internal successors, (56), 46 states have internal predecessors, (56), 23 states have call successors, (23), 7 states have call predecessors, (23), 6 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 01:34:58,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 100 transitions. [2021-05-06 01:34:58,474 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 100 transitions. Word has length 31 [2021-05-06 01:34:58,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 01:34:58,474 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 100 transitions. [2021-05-06 01:34:58,474 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 01:34:58,475 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 100 transitions. [2021-05-06 01:34:58,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-06 01:34:58,475 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:34:58,475 INFO L523 BasicCegarLoop]: trace histogram [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, 1, 1] [2021-05-06 01:34:58,689 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 01:34:58,689 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:34:58,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:34:58,689 INFO L82 PathProgramCache]: Analyzing trace with hash 202176206, now seen corresponding path program 1 times [2021-05-06 01:34:58,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:34:58,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764607387] [2021-05-06 01:34:58,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:34:58,699 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 01:34:58,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1079480664] [2021-05-06 01:34:58,699 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 01:34:58,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:34:58,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 01:34:58,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 01:34:58,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:34:58,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:34:58,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:34:58,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:34:58,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:34:58,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:34:58,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:34:58,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:34:58,880 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 01:34:58,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 01:34:58,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764607387] [2021-05-06 01:34:58,881 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 01:34:58,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079480664] [2021-05-06 01:34:58,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079480664] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 01:34:58,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 01:34:58,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 01:34:58,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030915286] [2021-05-06 01:34:58,882 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 01:34:58,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 01:34:58,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 01:34:58,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 01:34:58,883 INFO L87 Difference]: Start difference. First operand 74 states and 100 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 01:34:58,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 01:34:58,919 INFO L93 Difference]: Finished difference Result 113 states and 153 transitions. [2021-05-06 01:34:58,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 01:34:58,920 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 34 [2021-05-06 01:34:58,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 01:34:58,922 INFO L225 Difference]: With dead ends: 113 [2021-05-06 01:34:58,922 INFO L226 Difference]: Without dead ends: 78 [2021-05-06 01:34:58,923 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 9.3ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 01:34:58,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-05-06 01:34:58,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-05-06 01:34:58,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 47 states have (on average 1.2340425531914894) internal successors, (58), 49 states have internal predecessors, (58), 23 states have call successors, (23), 8 states have call predecessors, (23), 7 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 01:34:58,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 102 transitions. [2021-05-06 01:34:58,932 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 102 transitions. Word has length 34 [2021-05-06 01:34:58,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 01:34:58,932 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 102 transitions. [2021-05-06 01:34:58,932 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 01:34:58,932 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 102 transitions. [2021-05-06 01:34:58,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-06 01:34:58,933 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:34:58,933 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 01:34:59,144 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-06 01:34:59,145 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:34:59,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:34:59,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1813008070, now seen corresponding path program 1 times [2021-05-06 01:34:59,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:34:59,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406977476] [2021-05-06 01:34:59,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:34:59,159 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 01:34:59,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [275551860] [2021-05-06 01:34:59,160 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 01:34:59,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:34:59,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 01:34:59,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 01:34:59,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:34:59,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:34:59,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:34:59,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:34:59,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:34:59,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:34:59,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:34:59,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:34:59,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:34:59,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:34:59,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:34:59,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:34:59,371 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 01:34:59,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 01:34:59,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406977476] [2021-05-06 01:34:59,372 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 01:34:59,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275551860] [2021-05-06 01:34:59,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275551860] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 01:34:59,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 01:34:59,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-06 01:34:59,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184741635] [2021-05-06 01:34:59,372 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 01:34:59,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 01:34:59,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 01:34:59,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 01:34:59,373 INFO L87 Difference]: Start difference. First operand 78 states and 102 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 01:34:59,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 01:34:59,456 INFO L93 Difference]: Finished difference Result 84 states and 107 transitions. [2021-05-06 01:34:59,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 01:34:59,457 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 41 [2021-05-06 01:34:59,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 01:34:59,458 INFO L225 Difference]: With dead ends: 84 [2021-05-06 01:34:59,458 INFO L226 Difference]: Without dead ends: 82 [2021-05-06 01:34:59,459 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 46.8ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-06 01:34:59,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-05-06 01:34:59,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2021-05-06 01:34:59,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 50 states have (on average 1.22) internal successors, (61), 52 states have internal predecessors, (61), 23 states have call successors, (23), 9 states have call predecessors, (23), 8 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 01:34:59,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 105 transitions. [2021-05-06 01:34:59,469 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 105 transitions. Word has length 41 [2021-05-06 01:34:59,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 01:34:59,469 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 105 transitions. [2021-05-06 01:34:59,469 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 01:34:59,469 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 105 transitions. [2021-05-06 01:34:59,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-06 01:34:59,470 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:34:59,471 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 01:34:59,684 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 01:34:59,685 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:34:59,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:34:59,685 INFO L82 PathProgramCache]: Analyzing trace with hash -683043127, now seen corresponding path program 1 times [2021-05-06 01:34:59,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:34:59,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802934996] [2021-05-06 01:34:59,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:34:59,695 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 01:34:59,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1043047729] [2021-05-06 01:34:59,695 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 01:34:59,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:34:59,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 01:34:59,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 01:34:59,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:34:59,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:34:59,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:34:59,899 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-06 01:34:59,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 01:34:59,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802934996] [2021-05-06 01:34:59,900 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 01:34:59,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043047729] [2021-05-06 01:34:59,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043047729] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 01:34:59,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 01:34:59,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 01:34:59,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269559529] [2021-05-06 01:34:59,901 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 01:34:59,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 01:34:59,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 01:34:59,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 01:34:59,901 INFO L87 Difference]: Start difference. First operand 82 states and 105 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 01:35:00,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 01:35:00,011 INFO L93 Difference]: Finished difference Result 88 states and 110 transitions. [2021-05-06 01:35:00,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 01:35:00,011 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2021-05-06 01:35:00,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 01:35:00,015 INFO L225 Difference]: With dead ends: 88 [2021-05-06 01:35:00,015 INFO L226 Difference]: Without dead ends: 86 [2021-05-06 01:35:00,016 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 50.1ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-06 01:35:00,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-05-06 01:35:00,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2021-05-06 01:35:00,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 53 states have (on average 1.2075471698113207) internal successors, (64), 55 states have internal predecessors, (64), 23 states have call successors, (23), 10 states have call predecessors, (23), 9 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 01:35:00,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 108 transitions. [2021-05-06 01:35:00,041 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 108 transitions. Word has length 47 [2021-05-06 01:35:00,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 01:35:00,041 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 108 transitions. [2021-05-06 01:35:00,041 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 01:35:00,041 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 108 transitions. [2021-05-06 01:35:00,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-06 01:35:00,042 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:35:00,042 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 01:35:00,262 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 01:35:00,262 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:35:00,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:35:00,263 INFO L82 PathProgramCache]: Analyzing trace with hash -589126939, now seen corresponding path program 1 times [2021-05-06 01:35:00,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:35:00,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511801150] [2021-05-06 01:35:00,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:35:00,271 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 01:35:00,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1083485415] [2021-05-06 01:35:00,271 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 01:35:00,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:35:00,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 01:35:00,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 01:35:00,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:00,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:00,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:00,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:00,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:00,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:00,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:00,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:00,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:00,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:00,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:00,463 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-06 01:35:00,463 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 01:35:00,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511801150] [2021-05-06 01:35:00,463 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 01:35:00,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083485415] [2021-05-06 01:35:00,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083485415] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 01:35:00,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 01:35:00,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 01:35:00,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181529896] [2021-05-06 01:35:00,464 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 01:35:00,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 01:35:00,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 01:35:00,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 01:35:00,465 INFO L87 Difference]: Start difference. First operand 86 states and 108 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-06 01:35:00,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 01:35:00,520 INFO L93 Difference]: Finished difference Result 115 states and 134 transitions. [2021-05-06 01:35:00,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 01:35:00,521 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 50 [2021-05-06 01:35:00,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 01:35:00,522 INFO L225 Difference]: With dead ends: 115 [2021-05-06 01:35:00,522 INFO L226 Difference]: Without dead ends: 108 [2021-05-06 01:35:00,523 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 18.1ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 01:35:00,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-05-06 01:35:00,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 106. [2021-05-06 01:35:00,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 68 states have (on average 1.161764705882353) internal successors, (79), 71 states have internal predecessors, (79), 24 states have call successors, (24), 14 states have call predecessors, (24), 13 states have return successors, (22), 20 states have call predecessors, (22), 22 states have call successors, (22) [2021-05-06 01:35:00,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 125 transitions. [2021-05-06 01:35:00,535 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 125 transitions. Word has length 50 [2021-05-06 01:35:00,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 01:35:00,535 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 125 transitions. [2021-05-06 01:35:00,535 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-06 01:35:00,535 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 125 transitions. [2021-05-06 01:35:00,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-06 01:35:00,536 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:35:00,536 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 01:35:00,762 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-06 01:35:00,762 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:35:00,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:35:00,763 INFO L82 PathProgramCache]: Analyzing trace with hash -484699953, now seen corresponding path program 1 times [2021-05-06 01:35:00,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:35:00,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534045688] [2021-05-06 01:35:00,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:35:00,769 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 01:35:00,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1838527476] [2021-05-06 01:35:00,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 01:35:00,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:35:00,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 01:35:00,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 01:35:00,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:00,985 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-06 01:35:00,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 01:35:00,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534045688] [2021-05-06 01:35:00,986 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 01:35:00,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838527476] [2021-05-06 01:35:00,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838527476] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 01:35:00,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 01:35:00,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 01:35:00,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489136925] [2021-05-06 01:35:00,987 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 01:35:00,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 01:35:00,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 01:35:00,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 01:35:00,988 INFO L87 Difference]: Start difference. First operand 106 states and 125 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-06 01:35:01,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 01:35:01,125 INFO L93 Difference]: Finished difference Result 134 states and 166 transitions. [2021-05-06 01:35:01,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 01:35:01,125 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 55 [2021-05-06 01:35:01,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 01:35:01,127 INFO L225 Difference]: With dead ends: 134 [2021-05-06 01:35:01,127 INFO L226 Difference]: Without dead ends: 131 [2021-05-06 01:35:01,127 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 33.6ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-06 01:35:01,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-05-06 01:35:01,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 127. [2021-05-06 01:35:01,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 79 states have (on average 1.1898734177215189) internal successors, (94), 82 states have internal predecessors, (94), 33 states have call successors, (33), 15 states have call predecessors, (33), 14 states have return successors, (31), 29 states have call predecessors, (31), 31 states have call successors, (31) [2021-05-06 01:35:01,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 158 transitions. [2021-05-06 01:35:01,140 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 158 transitions. Word has length 55 [2021-05-06 01:35:01,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 01:35:01,140 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 158 transitions. [2021-05-06 01:35:01,140 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-06 01:35:01,141 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 158 transitions. [2021-05-06 01:35:01,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-06 01:35:01,141 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:35:01,142 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 01:35:01,356 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 01:35:01,357 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:35:01,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:35:01,357 INFO L82 PathProgramCache]: Analyzing trace with hash 765609565, now seen corresponding path program 1 times [2021-05-06 01:35:01,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:35:01,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4068782] [2021-05-06 01:35:01,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:35:01,366 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 01:35:01,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1912584194] [2021-05-06 01:35:01,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 01:35:01,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:35:01,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 01:35:01,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 01:35:01,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:01,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:01,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:01,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:01,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:01,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:01,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:01,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:01,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:01,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:01,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:01,549 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 14 proven. 34 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-06 01:35:01,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 01:35:01,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4068782] [2021-05-06 01:35:01,550 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 01:35:01,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912584194] [2021-05-06 01:35:01,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912584194] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 01:35:01,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 01:35:01,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 01:35:01,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898891435] [2021-05-06 01:35:01,551 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 01:35:01,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 01:35:01,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 01:35:01,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 01:35:01,551 INFO L87 Difference]: Start difference. First operand 127 states and 158 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-06 01:35:01,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 01:35:01,603 INFO L93 Difference]: Finished difference Result 173 states and 218 transitions. [2021-05-06 01:35:01,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 01:35:01,604 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 58 [2021-05-06 01:35:01,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 01:35:01,605 INFO L225 Difference]: With dead ends: 173 [2021-05-06 01:35:01,605 INFO L226 Difference]: Without dead ends: 130 [2021-05-06 01:35:01,605 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 17.0ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-05-06 01:35:01,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-05-06 01:35:01,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2021-05-06 01:35:01,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 82 states have (on average 1.1829268292682926) internal successors, (97), 84 states have internal predecessors, (97), 33 states have call successors, (33), 15 states have call predecessors, (33), 14 states have return successors, (31), 30 states have call predecessors, (31), 31 states have call successors, (31) [2021-05-06 01:35:01,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 161 transitions. [2021-05-06 01:35:01,617 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 161 transitions. Word has length 58 [2021-05-06 01:35:01,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 01:35:01,617 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 161 transitions. [2021-05-06 01:35:01,617 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-06 01:35:01,617 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 161 transitions. [2021-05-06 01:35:01,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-06 01:35:01,618 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:35:01,618 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 01:35:01,842 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 01:35:01,843 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:35:01,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:35:01,843 INFO L82 PathProgramCache]: Analyzing trace with hash 78053411, now seen corresponding path program 1 times [2021-05-06 01:35:01,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:35:01,843 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926064923] [2021-05-06 01:35:01,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:35:01,851 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 01:35:01,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [709259727] [2021-05-06 01:35:01,852 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 01:35:01,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:35:01,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-06 01:35:01,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 01:35:01,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:01,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:01,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:01,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:01,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:01,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:02,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:02,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:02,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:02,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:02,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:02,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:02,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:02,054 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-05-06 01:35:02,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 01:35:02,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926064923] [2021-05-06 01:35:02,055 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 01:35:02,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709259727] [2021-05-06 01:35:02,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709259727] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 01:35:02,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 01:35:02,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 01:35:02,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589018846] [2021-05-06 01:35:02,055 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 01:35:02,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 01:35:02,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 01:35:02,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 01:35:02,057 INFO L87 Difference]: Start difference. First operand 130 states and 161 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 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 01:35:02,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 01:35:02,121 INFO L93 Difference]: Finished difference Result 190 states and 240 transitions. [2021-05-06 01:35:02,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 01:35:02,122 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 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 66 [2021-05-06 01:35:02,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 01:35:02,124 INFO L225 Difference]: With dead ends: 190 [2021-05-06 01:35:02,124 INFO L226 Difference]: Without dead ends: 119 [2021-05-06 01:35:02,124 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 18.8ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 01:35:02,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-05-06 01:35:02,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 112. [2021-05-06 01:35:02,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 72 states have (on average 1.1527777777777777) internal successors, (83), 74 states have internal predecessors, (83), 26 states have call successors, (26), 14 states have call predecessors, (26), 13 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-06 01:35:02,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 133 transitions. [2021-05-06 01:35:02,133 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 133 transitions. Word has length 66 [2021-05-06 01:35:02,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 01:35:02,134 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 133 transitions. [2021-05-06 01:35:02,134 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 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 01:35:02,134 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 133 transitions. [2021-05-06 01:35:02,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-06 01:35:02,135 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:35:02,135 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 01:35:02,359 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-06 01:35:02,360 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:35:02,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:35:02,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1361251212, now seen corresponding path program 1 times [2021-05-06 01:35:02,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:35:02,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094025320] [2021-05-06 01:35:02,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:35:02,368 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 01:35:02,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1689594526] [2021-05-06 01:35:02,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 01:35:02,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:35:02,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 01:35:02,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 01:35:02,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:02,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:02,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:02,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:02,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:02,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:02,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:02,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:02,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:02,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:02,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:02,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:02,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:02,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:02,581 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 18 proven. 112 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-06 01:35:02,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 01:35:02,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094025320] [2021-05-06 01:35:02,582 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 01:35:02,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689594526] [2021-05-06 01:35:02,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689594526] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 01:35:02,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 01:35:02,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 01:35:02,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612796720] [2021-05-06 01:35:02,583 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 01:35:02,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 01:35:02,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 01:35:02,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 01:35:02,584 INFO L87 Difference]: Start difference. First operand 112 states and 133 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 6 states have call successors, (13), 6 states have call predecessors, (13), 4 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-06 01:35:02,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 01:35:02,651 INFO L93 Difference]: Finished difference Result 141 states and 164 transitions. [2021-05-06 01:35:02,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 01:35:02,652 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 6 states have call successors, (13), 6 states have call predecessors, (13), 4 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) Word has length 74 [2021-05-06 01:35:02,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 01:35:02,653 INFO L225 Difference]: With dead ends: 141 [2021-05-06 01:35:02,653 INFO L226 Difference]: Without dead ends: 134 [2021-05-06 01:35:02,653 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 21.7ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 01:35:02,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-05-06 01:35:02,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 132. [2021-05-06 01:35:02,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 85 states have (on average 1.1411764705882352) internal successors, (97), 88 states have internal predecessors, (97), 30 states have call successors, (30), 17 states have call predecessors, (30), 16 states have return successors, (28), 26 states have call predecessors, (28), 28 states have call successors, (28) [2021-05-06 01:35:02,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 155 transitions. [2021-05-06 01:35:02,663 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 155 transitions. Word has length 74 [2021-05-06 01:35:02,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 01:35:02,664 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 155 transitions. [2021-05-06 01:35:02,664 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 6 states have call successors, (13), 6 states have call predecessors, (13), 4 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-06 01:35:02,664 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 155 transitions. [2021-05-06 01:35:02,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-06 01:35:02,665 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:35:02,665 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 01:35:02,888 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-06 01:35:02,889 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:35:02,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:35:02,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1777426592, now seen corresponding path program 1 times [2021-05-06 01:35:02,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:35:02,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691144203] [2021-05-06 01:35:02,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:35:02,896 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 01:35:02,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1630059273] [2021-05-06 01:35:02,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 01:35:03,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:35:03,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-06 01:35:03,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 01:35:03,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:03,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:03,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:03,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:03,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:03,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:03,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:03,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:03,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:03,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:03,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:03,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:03,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:03,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:03,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:03,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:03,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:03,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:03,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:03,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:03,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:03,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:03,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:03,565 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-05-06 01:35:03,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 01:35:03,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691144203] [2021-05-06 01:35:03,565 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 01:35:03,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630059273] [2021-05-06 01:35:03,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630059273] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 01:35:03,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 01:35:03,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 01:35:03,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038005356] [2021-05-06 01:35:03,566 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 01:35:03,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 01:35:03,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 01:35:03,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-06 01:35:03,567 INFO L87 Difference]: Start difference. First operand 132 states and 155 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 9 states have internal predecessors, (26), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 01:35:03,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 01:35:03,806 INFO L93 Difference]: Finished difference Result 165 states and 200 transitions. [2021-05-06 01:35:03,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 01:35:03,807 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 9 states have internal predecessors, (26), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) Word has length 79 [2021-05-06 01:35:03,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 01:35:03,809 INFO L225 Difference]: With dead ends: 165 [2021-05-06 01:35:03,809 INFO L226 Difference]: Without dead ends: 162 [2021-05-06 01:35:03,810 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 83.5ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-06 01:35:03,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-05-06 01:35:03,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 157. [2021-05-06 01:35:03,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 99 states have (on average 1.1616161616161615) internal successors, (115), 102 states have internal predecessors, (115), 39 states have call successors, (39), 19 states have call predecessors, (39), 18 states have return successors, (37), 35 states have call predecessors, (37), 37 states have call successors, (37) [2021-05-06 01:35:03,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 191 transitions. [2021-05-06 01:35:03,827 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 191 transitions. Word has length 79 [2021-05-06 01:35:03,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 01:35:03,829 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 191 transitions. [2021-05-06 01:35:03,829 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 9 states have internal predecessors, (26), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 01:35:03,829 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 191 transitions. [2021-05-06 01:35:03,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-05-06 01:35:03,830 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:35:03,830 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 01:35:04,041 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-06 01:35:04,041 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:35:04,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:35:04,041 INFO L82 PathProgramCache]: Analyzing trace with hash -554329876, now seen corresponding path program 2 times [2021-05-06 01:35:04,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:35:04,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415133702] [2021-05-06 01:35:04,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:35:04,047 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 01:35:04,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [890404500] [2021-05-06 01:35:04,048 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 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 01:35:04,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 01:35:04,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 01:35:04,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 01:35:04,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 01:35:04,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:04,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:04,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:04,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:04,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:04,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:04,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:04,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:04,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:04,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:04,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:04,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:04,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:04,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:04,268 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 22 proven. 140 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-06 01:35:04,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 01:35:04,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415133702] [2021-05-06 01:35:04,269 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 01:35:04,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890404500] [2021-05-06 01:35:04,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890404500] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 01:35:04,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 01:35:04,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 01:35:04,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793735218] [2021-05-06 01:35:04,269 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 01:35:04,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 01:35:04,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 01:35:04,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 01:35:04,270 INFO L87 Difference]: Start difference. First operand 157 states and 191 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 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 01:35:04,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 01:35:04,359 INFO L93 Difference]: Finished difference Result 209 states and 260 transitions. [2021-05-06 01:35:04,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 01:35:04,359 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 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 82 [2021-05-06 01:35:04,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 01:35:04,361 INFO L225 Difference]: With dead ends: 209 [2021-05-06 01:35:04,361 INFO L226 Difference]: Without dead ends: 160 [2021-05-06 01:35:04,361 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 34.5ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-06 01:35:04,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-05-06 01:35:04,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2021-05-06 01:35:04,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 102 states have (on average 1.1568627450980393) internal successors, (118), 104 states have internal predecessors, (118), 39 states have call successors, (39), 19 states have call predecessors, (39), 18 states have return successors, (37), 36 states have call predecessors, (37), 37 states have call successors, (37) [2021-05-06 01:35:04,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 194 transitions. [2021-05-06 01:35:04,373 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 194 transitions. Word has length 82 [2021-05-06 01:35:04,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 01:35:04,373 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 194 transitions. [2021-05-06 01:35:04,373 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 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 01:35:04,373 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 194 transitions. [2021-05-06 01:35:04,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-06 01:35:04,374 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:35:04,374 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 01:35:04,599 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 01:35:04,599 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:35:04,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:35:04,600 INFO L82 PathProgramCache]: Analyzing trace with hash 1891783602, now seen corresponding path program 1 times [2021-05-06 01:35:04,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:35:04,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054883558] [2021-05-06 01:35:04,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:35:04,605 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 01:35:04,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1295024564] [2021-05-06 01:35:04,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 01:35:04,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:35:04,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 01:35:04,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 01:35:04,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:04,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:04,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:04,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:04,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:04,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:04,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:04,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:04,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:04,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:04,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:04,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:04,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:04,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:04,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:04,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:04,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:04,885 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 27 proven. 191 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-05-06 01:35:04,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 01:35:04,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054883558] [2021-05-06 01:35:04,886 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 01:35:04,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295024564] [2021-05-06 01:35:04,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295024564] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 01:35:04,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 01:35:04,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 01:35:04,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705856372] [2021-05-06 01:35:04,887 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 01:35:04,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 01:35:04,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 01:35:04,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 01:35:04,887 INFO L87 Difference]: Start difference. First operand 160 states and 194 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 7 states have call successors, (15), 7 states have call predecessors, (15), 5 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) [2021-05-06 01:35:05,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 01:35:05,026 INFO L93 Difference]: Finished difference Result 235 states and 287 transitions. [2021-05-06 01:35:05,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 01:35:05,027 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 7 states have call successors, (15), 7 states have call predecessors, (15), 5 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) Word has length 90 [2021-05-06 01:35:05,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 01:35:05,028 INFO L225 Difference]: With dead ends: 235 [2021-05-06 01:35:05,028 INFO L226 Difference]: Without dead ends: 186 [2021-05-06 01:35:05,029 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 41.9ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-06 01:35:05,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-05-06 01:35:05,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 184. [2021-05-06 01:35:05,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 118 states have (on average 1.1355932203389831) internal successors, (134), 120 states have internal predecessors, (134), 43 states have call successors, (43), 23 states have call predecessors, (43), 22 states have return successors, (41), 40 states have call predecessors, (41), 41 states have call successors, (41) [2021-05-06 01:35:05,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 218 transitions. [2021-05-06 01:35:05,043 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 218 transitions. Word has length 90 [2021-05-06 01:35:05,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 01:35:05,043 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 218 transitions. [2021-05-06 01:35:05,043 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 7 states have call successors, (15), 7 states have call predecessors, (15), 5 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) [2021-05-06 01:35:05,044 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 218 transitions. [2021-05-06 01:35:05,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-05-06 01:35:05,045 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:35:05,045 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 01:35:05,260 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-06 01:35:05,261 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:35:05,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:35:05,261 INFO L82 PathProgramCache]: Analyzing trace with hash -768653053, now seen corresponding path program 2 times [2021-05-06 01:35:05,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:35:05,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56957909] [2021-05-06 01:35:05,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:35:05,269 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 01:35:05,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1628165800] [2021-05-06 01:35:05,269 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 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 01:35:05,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 01:35:05,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 01:35:05,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 01:35:05,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 01:35:05,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:05,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:05,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:05,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:05,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:05,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:05,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:05,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:05,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:05,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:05,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:05,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:05,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:05,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:05,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:05,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:05,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:05,506 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 26 proven. 270 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-05-06 01:35:05,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 01:35:05,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56957909] [2021-05-06 01:35:05,507 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 01:35:05,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628165800] [2021-05-06 01:35:05,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628165800] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 01:35:05,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 01:35:05,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 01:35:05,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260614057] [2021-05-06 01:35:05,508 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 01:35:05,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 01:35:05,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 01:35:05,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 01:35:05,509 INFO L87 Difference]: Start difference. First operand 184 states and 218 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 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 01:35:05,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 01:35:05,616 INFO L93 Difference]: Finished difference Result 194 states and 228 transitions. [2021-05-06 01:35:05,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 01:35:05,617 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 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 98 [2021-05-06 01:35:05,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 01:35:05,618 INFO L225 Difference]: With dead ends: 194 [2021-05-06 01:35:05,618 INFO L226 Difference]: Without dead ends: 187 [2021-05-06 01:35:05,618 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 33.3ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-06 01:35:05,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-05-06 01:35:05,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2021-05-06 01:35:05,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 121 states have (on average 1.1322314049586777) internal successors, (137), 123 states have internal predecessors, (137), 43 states have call successors, (43), 23 states have call predecessors, (43), 22 states have return successors, (41), 40 states have call predecessors, (41), 41 states have call successors, (41) [2021-05-06 01:35:05,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 221 transitions. [2021-05-06 01:35:05,632 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 221 transitions. Word has length 98 [2021-05-06 01:35:05,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 01:35:05,632 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 221 transitions. [2021-05-06 01:35:05,632 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 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 01:35:05,632 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 221 transitions. [2021-05-06 01:35:05,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-05-06 01:35:05,633 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:35:05,633 INFO L523 BasicCegarLoop]: trace histogram [15, 14, 14, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 01:35:05,848 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-06 01:35:05,849 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:35:05,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:35:05,849 INFO L82 PathProgramCache]: Analyzing trace with hash -721908367, now seen corresponding path program 2 times [2021-05-06 01:35:05,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:35:05,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976655720] [2021-05-06 01:35:05,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:35:05,856 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 01:35:05,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1801961402] [2021-05-06 01:35:05,856 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 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 01:35:05,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 01:35:05,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 01:35:05,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-06 01:35:05,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 01:35:06,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:06,181 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 28 proven. 24 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-05-06 01:35:06,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 01:35:06,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976655720] [2021-05-06 01:35:06,182 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 01:35:06,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801961402] [2021-05-06 01:35:06,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801961402] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 01:35:06,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 01:35:06,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 01:35:06,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285821785] [2021-05-06 01:35:06,183 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 01:35:06,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 01:35:06,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 01:35:06,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-06 01:35:06,183 INFO L87 Difference]: Start difference. First operand 187 states and 221 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 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 01:35:06,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 01:35:06,377 INFO L93 Difference]: Finished difference Result 219 states and 265 transitions. [2021-05-06 01:35:06,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 01:35:06,378 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 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 103 [2021-05-06 01:35:06,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 01:35:06,379 INFO L225 Difference]: With dead ends: 219 [2021-05-06 01:35:06,379 INFO L226 Difference]: Without dead ends: 216 [2021-05-06 01:35:06,380 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 55.4ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-06 01:35:06,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-05-06 01:35:06,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 212. [2021-05-06 01:35:06,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 135 states have (on average 1.1481481481481481) internal successors, (155), 137 states have internal predecessors, (155), 52 states have call successors, (52), 25 states have call predecessors, (52), 24 states have return successors, (50), 49 states have call predecessors, (50), 50 states have call successors, (50) [2021-05-06 01:35:06,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 257 transitions. [2021-05-06 01:35:06,394 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 257 transitions. Word has length 103 [2021-05-06 01:35:06,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 01:35:06,394 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 257 transitions. [2021-05-06 01:35:06,395 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 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 01:35:06,395 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 257 transitions. [2021-05-06 01:35:06,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-05-06 01:35:06,396 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:35:06,396 INFO L523 BasicCegarLoop]: trace histogram [15, 14, 14, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 01:35:06,620 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-06 01:35:06,621 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:35:06,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:35:06,621 INFO L82 PathProgramCache]: Analyzing trace with hash 447330249, now seen corresponding path program 3 times [2021-05-06 01:35:06,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:35:06,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878979812] [2021-05-06 01:35:06,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:35:06,628 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 01:35:06,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [343537675] [2021-05-06 01:35:06,628 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 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 01:35:06,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-06 01:35:06,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 01:35:06,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-06 01:35:06,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 01:35:06,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:06,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:06,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:06,929 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 86 proven. 36 refuted. 0 times theorem prover too weak. 298 trivial. 0 not checked. [2021-05-06 01:35:06,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 01:35:06,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878979812] [2021-05-06 01:35:06,930 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 01:35:06,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343537675] [2021-05-06 01:35:06,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343537675] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 01:35:06,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 01:35:06,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 01:35:06,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325032165] [2021-05-06 01:35:06,931 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 01:35:06,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 01:35:06,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 01:35:06,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-06 01:35:06,932 INFO L87 Difference]: Start difference. First operand 212 states and 257 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 01:35:07,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 01:35:07,319 INFO L93 Difference]: Finished difference Result 236 states and 289 transitions. [2021-05-06 01:35:07,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 01:35:07,319 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) Word has length 106 [2021-05-06 01:35:07,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 01:35:07,321 INFO L225 Difference]: With dead ends: 236 [2021-05-06 01:35:07,321 INFO L226 Difference]: Without dead ends: 225 [2021-05-06 01:35:07,323 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 104.6ms TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-05-06 01:35:07,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-05-06 01:35:07,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 194. [2021-05-06 01:35:07,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 126 states have (on average 1.0952380952380953) internal successors, (138), 129 states have internal predecessors, (138), 43 states have call successors, (43), 25 states have call predecessors, (43), 24 states have return successors, (41), 39 states have call predecessors, (41), 41 states have call successors, (41) [2021-05-06 01:35:07,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 222 transitions. [2021-05-06 01:35:07,343 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 222 transitions. Word has length 106 [2021-05-06 01:35:07,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 01:35:07,344 INFO L480 AbstractCegarLoop]: Abstraction has 194 states and 222 transitions. [2021-05-06 01:35:07,344 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 01:35:07,345 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 222 transitions. [2021-05-06 01:35:07,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-05-06 01:35:07,346 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:35:07,347 INFO L523 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 01:35:07,570 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 01:35:07,570 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:35:07,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:35:07,571 INFO L82 PathProgramCache]: Analyzing trace with hash 436746049, now seen corresponding path program 2 times [2021-05-06 01:35:07,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:35:07,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108816055] [2021-05-06 01:35:07,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:35:07,577 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 01:35:07,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [673345041] [2021-05-06 01:35:07,577 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 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 01:35:07,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 01:35:07,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 01:35:07,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-06 01:35:07,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 01:35:07,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:07,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:07,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:07,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:07,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:07,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:07,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:07,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:07,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:07,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:07,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:07,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:07,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:07,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:07,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:07,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:07,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:07,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:07,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:07,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:07,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:07,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:07,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:07,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:07,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:07,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:07,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:07,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:07,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:07,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:07,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:07,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:07,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:07,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:07,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:07,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:07,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:07,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:07,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:07,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:07,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:07,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:07,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:07,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:07,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:07,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:07,911 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 102 proven. 18 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2021-05-06 01:35:07,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 01:35:07,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108816055] [2021-05-06 01:35:07,912 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 01:35:07,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673345041] [2021-05-06 01:35:07,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673345041] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 01:35:07,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 01:35:07,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 01:35:07,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053179073] [2021-05-06 01:35:07,912 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 01:35:07,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 01:35:07,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 01:35:07,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 01:35:07,913 INFO L87 Difference]: Start difference. First operand 194 states and 222 transitions. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2021-05-06 01:35:08,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 01:35:08,129 INFO L93 Difference]: Finished difference Result 286 states and 343 transitions. [2021-05-06 01:35:08,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 01:35:08,130 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 114 [2021-05-06 01:35:08,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 01:35:08,131 INFO L225 Difference]: With dead ends: 286 [2021-05-06 01:35:08,131 INFO L226 Difference]: Without dead ends: 193 [2021-05-06 01:35:08,132 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 66.3ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-05-06 01:35:08,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-05-06 01:35:08,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 179. [2021-05-06 01:35:08,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 116 states have (on average 1.103448275862069) internal successors, (128), 120 states have internal predecessors, (128), 40 states have call successors, (40), 23 states have call predecessors, (40), 22 states have return successors, (37), 35 states have call predecessors, (37), 37 states have call successors, (37) [2021-05-06 01:35:08,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 205 transitions. [2021-05-06 01:35:08,145 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 205 transitions. Word has length 114 [2021-05-06 01:35:08,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 01:35:08,146 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 205 transitions. [2021-05-06 01:35:08,146 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2021-05-06 01:35:08,146 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 205 transitions. [2021-05-06 01:35:08,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-05-06 01:35:08,147 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:35:08,147 INFO L523 BasicCegarLoop]: trace histogram [18, 17, 17, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 01:35:08,360 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 01:35:08,361 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:35:08,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:35:08,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1338024082, now seen corresponding path program 4 times [2021-05-06 01:35:08,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:35:08,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513142210] [2021-05-06 01:35:08,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:35:08,369 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 01:35:08,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1085108339] [2021-05-06 01:35:08,369 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 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 01:35:08,456 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 01:35:08,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 01:35:08,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-06 01:35:08,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 01:35:08,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:08,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:08,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:08,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:08,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:08,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:08,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:08,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:08,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:08,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:08,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:08,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:08,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:08,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:08,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:08,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:08,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:08,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:08,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:08,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:08,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:08,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:09,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:09,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:09,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:35:09,288 WARN L159 QuantifierPusher]: Ignoring assumption.