/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_valuebound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 02:28:25,154 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 02:28:25,156 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 02:28:25,179 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 02:28:25,189 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 02:28:25,190 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 02:28:25,191 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 02:28:25,191 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 02:28:25,192 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 02:28:25,192 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 02:28:25,194 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 02:28:25,206 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 02:28:25,207 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 02:28:25,211 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 02:28:25,212 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 02:28:25,215 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 02:28:25,217 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 02:28:25,222 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 02:28:25,222 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 02:28:25,225 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 02:28:25,225 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-06 02:28:25,241 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 02:28:25,241 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 02:28:25,242 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 02:28:25,242 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 02:28:25,242 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 02:28:25,242 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 02:28:25,242 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 02:28:25,242 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 02:28:25,242 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 02:28:25,243 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 02:28:25,243 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 02:28:25,243 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 02:28:25,243 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 02:28:25,243 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 02:28:25,243 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 02:28:25,243 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 02:28:25,243 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 02:28:25,243 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 02:28:25,243 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 02:28:25,244 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 02:28:25,244 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 02:28:25,244 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 02:28:25,244 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 02:28:25,244 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 02:28:25,244 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 02:28:25,244 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 02:28:25,244 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 02:28:25,244 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 02:28:25,244 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 02:28:25,488 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 02:28:25,501 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 02:28:25,502 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 02:28:25,503 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 02:28:25,503 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 02:28:25,504 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_valuebound10.c [2021-05-06 02:28:25,546 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61d3603d2/79208a6f747f412a997e3a576f6c1aaa/FLAG4c460e493 [2021-05-06 02:28:25,867 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 02:28:25,867 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_valuebound10.c [2021-05-06 02:28:25,873 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61d3603d2/79208a6f747f412a997e3a576f6c1aaa/FLAG4c460e493 [2021-05-06 02:28:26,291 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61d3603d2/79208a6f747f412a997e3a576f6c1aaa [2021-05-06 02:28:26,297 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 02:28:26,298 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 02:28:26,300 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 02:28:26,300 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 02:28:26,303 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 02:28:26,303 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 02:28:26" (1/1) ... [2021-05-06 02:28:26,304 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19bec5de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:28:26, skipping insertion in model container [2021-05-06 02:28:26,305 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 02:28:26" (1/1) ... [2021-05-06 02:28:26,310 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 02:28:26,322 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 02:28:26,428 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_valuebound10.c[489,502] [2021-05-06 02:28:26,438 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 02:28:26,445 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 02:28:26,455 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_valuebound10.c[489,502] [2021-05-06 02:28:26,478 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 02:28:26,521 INFO L208 MainTranslator]: Completed translation [2021-05-06 02:28:26,522 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:28:26 WrapperNode [2021-05-06 02:28:26,522 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 02:28:26,523 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 02:28:26,523 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 02:28:26,523 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 02:28:26,533 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:28:26" (1/1) ... [2021-05-06 02:28:26,533 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:28:26" (1/1) ... [2021-05-06 02:28:26,543 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:28:26" (1/1) ... [2021-05-06 02:28:26,544 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:28:26" (1/1) ... [2021-05-06 02:28:26,548 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:28:26" (1/1) ... [2021-05-06 02:28:26,551 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:28:26" (1/1) ... [2021-05-06 02:28:26,552 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:28:26" (1/1) ... [2021-05-06 02:28:26,554 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 02:28:26,555 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 02:28:26,555 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 02:28:26,555 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 02:28:26,555 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:28:26" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 02:28:26,641 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 02:28:26,642 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 02:28:26,642 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 02:28:26,642 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 02:28:26,643 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 02:28:26,643 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 02:28:26,643 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 02:28:26,643 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 02:28:26,643 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 02:28:26,644 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 02:28:26,644 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 02:28:26,644 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 02:28:26,645 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 02:28:26,645 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 02:28:26,646 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 02:28:26,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 02:28:26,647 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 02:28:26,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 02:28:26,647 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 02:28:26,647 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 02:28:26,910 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 02:28:26,910 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 02:28:26,911 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 02:28:26 BoogieIcfgContainer [2021-05-06 02:28:26,911 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 02:28:26,912 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 02:28:26,913 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 02:28:26,914 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 02:28:26,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 02:28:26" (1/3) ... [2021-05-06 02:28:26,915 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f84c9ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 02:28:26, skipping insertion in model container [2021-05-06 02:28:26,915 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:28:26" (2/3) ... [2021-05-06 02:28:26,915 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f84c9ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 02:28:26, skipping insertion in model container [2021-05-06 02:28:26,915 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 02:28:26" (3/3) ... [2021-05-06 02:28:26,916 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd-ll_valuebound10.c [2021-05-06 02:28:26,936 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 02:28:26,939 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 02:28:26,966 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 02:28:26,995 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 02:28:26,995 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 02:28:26,995 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 02:28:26,995 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 02:28:26,995 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 02:28:26,995 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 02:28:26,996 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 02:28:26,996 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 02:28:27,007 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 02:28:27,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 02:28:27,010 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:27,011 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:28:27,011 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:27,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:27,014 INFO L82 PathProgramCache]: Analyzing trace with hash 870870740, now seen corresponding path program 1 times [2021-05-06 02:28:27,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:27,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233982940] [2021-05-06 02:28:27,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:27,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:28:27,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 02:28:27,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:28:27,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 02:28:27,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:28:27,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 02:28:27,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:28:27,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 02:28:27,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:28:27,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-06 02:28:27,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:28:27,183 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 02:28:27,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:27,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233982940] [2021-05-06 02:28:27,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233982940] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:28:27,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:28:27,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 02:28:27,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300242821] [2021-05-06 02:28:27,189 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 02:28:27,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:27,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 02:28:27,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 02:28:27,201 INFO L87 Difference]: Start difference. First operand has 37 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 02:28:27,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:27,310 INFO L93 Difference]: Finished difference Result 67 states and 105 transitions. [2021-05-06 02:28:27,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 02:28:27,311 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-06 02:28:27,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:27,317 INFO L225 Difference]: With dead ends: 67 [2021-05-06 02:28:27,318 INFO L226 Difference]: Without dead ends: 32 [2021-05-06 02:28:27,320 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 02:28:27,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-06 02:28:27,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-06 02:28:27,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 02:28:27,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2021-05-06 02:28:27,355 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 33 [2021-05-06 02:28:27,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:27,355 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2021-05-06 02:28:27,355 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 02:28:27,356 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2021-05-06 02:28:27,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 02:28:27,357 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:27,357 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:28:27,357 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 02:28:27,358 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:27,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:27,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1006914976, now seen corresponding path program 1 times [2021-05-06 02:28:27,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:27,359 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334211004] [2021-05-06 02:28:27,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:27,387 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:27,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1107537997] [2021-05-06 02:28:27,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:27,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:28:27,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 02:28:27,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:27,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:27,658 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 02:28:27,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:27,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334211004] [2021-05-06 02:28:27,659 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:27,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107537997] [2021-05-06 02:28:27,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107537997] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:28:27,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:28:27,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 02:28:27,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931202391] [2021-05-06 02:28:27,661 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 02:28:27,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:27,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 02:28:27,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:28:27,662 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-06 02:28:27,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:27,722 INFO L93 Difference]: Finished difference Result 48 states and 65 transitions. [2021-05-06 02:28:27,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 02:28:27,723 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 33 [2021-05-06 02:28:27,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:27,726 INFO L225 Difference]: With dead ends: 48 [2021-05-06 02:28:27,726 INFO L226 Difference]: Without dead ends: 46 [2021-05-06 02:28:27,727 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.2ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:28:27,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-06 02:28:27,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2021-05-06 02:28:27,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 23 states have internal predecessors, (26), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 02:28:27,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2021-05-06 02:28:27,752 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 33 [2021-05-06 02:28:27,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:27,753 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2021-05-06 02:28:27,754 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-06 02:28:27,754 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2021-05-06 02:28:27,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-06 02:28:27,757 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:27,757 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:28:27,957 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 02:28:27,958 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:27,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:27,958 INFO L82 PathProgramCache]: Analyzing trace with hash -124657161, now seen corresponding path program 1 times [2021-05-06 02:28:27,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:27,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303741411] [2021-05-06 02:28:27,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:27,969 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:27,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [543665364] [2021-05-06 02:28:27,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:28,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:28:28,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 02:28:28,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:28,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:28,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:28,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:28,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:28,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:28,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:28,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:28,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:28,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:28,278 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 02:28:28,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:28,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303741411] [2021-05-06 02:28:28,279 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:28,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543665364] [2021-05-06 02:28:28,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543665364] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:28:28,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:28:28,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 02:28:28,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158612118] [2021-05-06 02:28:28,280 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 02:28:28,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:28,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 02:28:28,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:28:28,281 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand has 9 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 02:28:28,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:28,400 INFO L93 Difference]: Finished difference Result 70 states and 102 transitions. [2021-05-06 02:28:28,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 02:28:28,402 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 38 [2021-05-06 02:28:28,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:28,404 INFO L225 Difference]: With dead ends: 70 [2021-05-06 02:28:28,405 INFO L226 Difference]: Without dead ends: 68 [2021-05-06 02:28:28,405 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 64.8ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:28:28,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-06 02:28:28,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 61. [2021-05-06 02:28:28,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 30 states have (on average 1.3) internal successors, (39), 32 states have internal predecessors, (39), 25 states have call successors, (25), 6 states have call predecessors, (25), 5 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-06 02:28:28,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 87 transitions. [2021-05-06 02:28:28,431 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 87 transitions. Word has length 38 [2021-05-06 02:28:28,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:28,431 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 87 transitions. [2021-05-06 02:28:28,431 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 02:28:28,432 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 87 transitions. [2021-05-06 02:28:28,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-06 02:28:28,434 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:28,434 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 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 02:28:28,637 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:28,637 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:28,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:28,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1732898944, now seen corresponding path program 1 times [2021-05-06 02:28:28,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:28,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696566250] [2021-05-06 02:28:28,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:28,661 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:28,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1366780583] [2021-05-06 02:28:28,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:28,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:28:28,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 02:28:28,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:28,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:28,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:28,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:28,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:28,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:28,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:28,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:28,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:28,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:28,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:28,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:28,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:28,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:28,922 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-06 02:28:28,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:28,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696566250] [2021-05-06 02:28:28,923 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:28,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366780583] [2021-05-06 02:28:28,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366780583] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:28:28,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:28:28,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 02:28:28,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101261497] [2021-05-06 02:28:28,923 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 02:28:28,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:28,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 02:28:28,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:28:28,924 INFO L87 Difference]: Start difference. First operand 61 states and 87 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-06 02:28:29,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:29,039 INFO L93 Difference]: Finished difference Result 68 states and 93 transitions. [2021-05-06 02:28:29,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 02:28:29,040 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 43 [2021-05-06 02:28:29,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:29,040 INFO L225 Difference]: With dead ends: 68 [2021-05-06 02:28:29,040 INFO L226 Difference]: Without dead ends: 64 [2021-05-06 02:28:29,041 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 51.4ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:28:29,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-06 02:28:29,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-05-06 02:28:29,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 35 states have internal predecessors, (42), 24 states have call successors, (24), 7 states have call predecessors, (24), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 02:28:29,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 87 transitions. [2021-05-06 02:28:29,048 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 87 transitions. Word has length 43 [2021-05-06 02:28:29,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:29,049 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 87 transitions. [2021-05-06 02:28:29,049 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-06 02:28:29,049 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 87 transitions. [2021-05-06 02:28:29,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-06 02:28:29,049 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:29,050 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:28:29,250 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:29,250 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:29,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:29,251 INFO L82 PathProgramCache]: Analyzing trace with hash -301191846, now seen corresponding path program 1 times [2021-05-06 02:28:29,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:29,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146512247] [2021-05-06 02:28:29,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:29,259 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:29,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [427253607] [2021-05-06 02:28:29,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:29,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:28:29,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 02:28:29,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:29,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:29,487 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-05-06 02:28:29,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:29,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146512247] [2021-05-06 02:28:29,487 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:29,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427253607] [2021-05-06 02:28:29,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427253607] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:28:29,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:28:29,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 02:28:29,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700481605] [2021-05-06 02:28:29,488 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 02:28:29,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:29,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 02:28:29,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:28:29,489 INFO L87 Difference]: Start difference. First operand 64 states and 87 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2021-05-06 02:28:29,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:29,537 INFO L93 Difference]: Finished difference Result 70 states and 92 transitions. [2021-05-06 02:28:29,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 02:28:29,537 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) Word has length 49 [2021-05-06 02:28:29,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:29,540 INFO L225 Difference]: With dead ends: 70 [2021-05-06 02:28:29,540 INFO L226 Difference]: Without dead ends: 68 [2021-05-06 02:28:29,541 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.8ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:28:29,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-06 02:28:29,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-05-06 02:28:29,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 36 states have (on average 1.25) internal successors, (45), 38 states have internal predecessors, (45), 24 states have call successors, (24), 8 states have call predecessors, (24), 7 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 02:28:29,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 90 transitions. [2021-05-06 02:28:29,552 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 90 transitions. Word has length 49 [2021-05-06 02:28:29,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:29,552 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 90 transitions. [2021-05-06 02:28:29,552 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2021-05-06 02:28:29,552 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 90 transitions. [2021-05-06 02:28:29,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-06 02:28:29,553 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:29,553 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:28:29,770 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:29,773 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:29,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:29,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1107651435, now seen corresponding path program 1 times [2021-05-06 02:28:29,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:29,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023647469] [2021-05-06 02:28:29,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:29,793 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:29,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [689584489] [2021-05-06 02:28:29,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:29,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:28:29,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 02:28:29,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:29,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:29,982 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-05-06 02:28:29,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:29,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023647469] [2021-05-06 02:28:29,982 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:29,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689584489] [2021-05-06 02:28:29,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689584489] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:28:29,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:28:29,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 02:28:29,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382559619] [2021-05-06 02:28:29,983 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 02:28:29,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:29,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 02:28:29,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:28:29,984 INFO L87 Difference]: Start difference. First operand 68 states and 90 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-06 02:28:30,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:30,028 INFO L93 Difference]: Finished difference Result 84 states and 108 transitions. [2021-05-06 02:28:30,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 02:28:30,029 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 51 [2021-05-06 02:28:30,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:30,030 INFO L225 Difference]: With dead ends: 84 [2021-05-06 02:28:30,030 INFO L226 Difference]: Without dead ends: 82 [2021-05-06 02:28:30,030 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.9ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:28:30,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-05-06 02:28:30,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2021-05-06 02:28:30,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 45 states have internal predecessors, (51), 27 states have call successors, (27), 10 states have call predecessors, (27), 9 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-06 02:28:30,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 102 transitions. [2021-05-06 02:28:30,051 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 102 transitions. Word has length 51 [2021-05-06 02:28:30,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:30,052 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 102 transitions. [2021-05-06 02:28:30,052 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-06 02:28:30,052 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 102 transitions. [2021-05-06 02:28:30,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-06 02:28:30,053 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:30,053 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 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, 1] [2021-05-06 02:28:30,270 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-06 02:28:30,270 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:30,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:30,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1924168317, now seen corresponding path program 1 times [2021-05-06 02:28:30,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:30,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658567372] [2021-05-06 02:28:30,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:30,279 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:30,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1865879072] [2021-05-06 02:28:30,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:30,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:28:30,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-06 02:28:30,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:30,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:30,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:30,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:30,418 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-05-06 02:28:30,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:30,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658567372] [2021-05-06 02:28:30,418 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:30,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865879072] [2021-05-06 02:28:30,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865879072] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:28:30,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:28:30,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 02:28:30,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131954611] [2021-05-06 02:28:30,419 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:28:30,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:30,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:28:30,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:28:30,419 INFO L87 Difference]: Start difference. First operand 79 states and 102 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 02:28:30,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:30,509 INFO L93 Difference]: Finished difference Result 88 states and 112 transitions. [2021-05-06 02:28:30,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 02:28:30,509 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 54 [2021-05-06 02:28:30,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:30,510 INFO L225 Difference]: With dead ends: 88 [2021-05-06 02:28:30,510 INFO L226 Difference]: Without dead ends: 84 [2021-05-06 02:28:30,510 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 40.6ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:28:30,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-05-06 02:28:30,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-05-06 02:28:30,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 49 states have internal predecessors, (53), 27 states have call successors, (27), 11 states have call predecessors, (27), 10 states have return successors, (25), 23 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-06 02:28:30,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 105 transitions. [2021-05-06 02:28:30,521 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 105 transitions. Word has length 54 [2021-05-06 02:28:30,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:30,521 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 105 transitions. [2021-05-06 02:28:30,521 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 02:28:30,521 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 105 transitions. [2021-05-06 02:28:30,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-06 02:28:30,522 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:30,522 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:28:30,740 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:30,741 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:30,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:30,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1698149216, now seen corresponding path program 1 times [2021-05-06 02:28:30,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:30,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3520333] [2021-05-06 02:28:30,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:30,759 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:30,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1412466517] [2021-05-06 02:28:30,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:30,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:28:30,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-06 02:28:30,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:30,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:30,939 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-05-06 02:28:30,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:30,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3520333] [2021-05-06 02:28:30,940 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:30,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412466517] [2021-05-06 02:28:30,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412466517] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:28:30,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:28:30,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 02:28:30,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130187086] [2021-05-06 02:28:30,940 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 02:28:30,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:30,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 02:28:30,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:28:30,942 INFO L87 Difference]: Start difference. First operand 84 states and 105 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 02:28:31,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:31,022 INFO L93 Difference]: Finished difference Result 118 states and 147 transitions. [2021-05-06 02:28:31,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 02:28:31,022 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 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 56 [2021-05-06 02:28:31,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:31,026 INFO L225 Difference]: With dead ends: 118 [2021-05-06 02:28:31,026 INFO L226 Difference]: Without dead ends: 116 [2021-05-06 02:28:31,027 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.8ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:28:31,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-05-06 02:28:31,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 112. [2021-05-06 02:28:31,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 64 states have (on average 1.15625) internal successors, (74), 67 states have internal predecessors, (74), 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 02:28:31,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 138 transitions. [2021-05-06 02:28:31,038 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 138 transitions. Word has length 56 [2021-05-06 02:28:31,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:31,039 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 138 transitions. [2021-05-06 02:28:31,039 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 02:28:31,039 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 138 transitions. [2021-05-06 02:28:31,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-06 02:28:31,039 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:31,040 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 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] [2021-05-06 02:28:31,256 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:31,257 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:31,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:31,257 INFO L82 PathProgramCache]: Analyzing trace with hash 888099957, now seen corresponding path program 2 times [2021-05-06 02:28:31,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:31,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435618690] [2021-05-06 02:28:31,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:31,264 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:31,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [422952418] [2021-05-06 02:28:31,264 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:31,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:28:31,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:28:31,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-06 02:28:31,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:31,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:31,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:31,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:31,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:31,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:31,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:31,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:31,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:31,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:31,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:31,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:31,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:31,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:31,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:31,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:31,456 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-05-06 02:28:31,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:31,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435618690] [2021-05-06 02:28:31,457 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:31,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422952418] [2021-05-06 02:28:31,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422952418] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:28:31,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:28:31,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 02:28:31,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117190589] [2021-05-06 02:28:31,458 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 02:28:31,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:31,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 02:28:31,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:28:31,459 INFO L87 Difference]: Start difference. First operand 112 states and 138 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 02:28:31,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:31,618 INFO L93 Difference]: Finished difference Result 137 states and 178 transitions. [2021-05-06 02:28:31,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 02:28:31,619 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 61 [2021-05-06 02:28:31,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:31,620 INFO L225 Difference]: With dead ends: 137 [2021-05-06 02:28:31,620 INFO L226 Difference]: Without dead ends: 131 [2021-05-06 02:28:31,621 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 48.4ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:28:31,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-05-06 02:28:31,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2021-05-06 02:28:31,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 73 states have (on average 1.178082191780822) internal successors, (86), 77 states have internal predecessors, (86), 42 states have call successors, (42), 16 states have call predecessors, (42), 15 states have return successors, (39), 37 states have call predecessors, (39), 39 states have call successors, (39) [2021-05-06 02:28:31,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 167 transitions. [2021-05-06 02:28:31,638 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 167 transitions. Word has length 61 [2021-05-06 02:28:31,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:31,638 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 167 transitions. [2021-05-06 02:28:31,638 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 02:28:31,638 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 167 transitions. [2021-05-06 02:28:31,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-06 02:28:31,642 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:31,642 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:28:31,860 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-06 02:28:31,860 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:31,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:31,861 INFO L82 PathProgramCache]: Analyzing trace with hash 2064127436, now seen corresponding path program 1 times [2021-05-06 02:28:31,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:31,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942181241] [2021-05-06 02:28:31,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:31,870 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:31,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1450773412] [2021-05-06 02:28:31,870 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 02:28:31,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:28:31,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 02:28:31,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:32,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:32,049 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-05-06 02:28:32,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:32,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942181241] [2021-05-06 02:28:32,049 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:32,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450773412] [2021-05-06 02:28:32,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450773412] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:28:32,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:28:32,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 02:28:32,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927232138] [2021-05-06 02:28:32,050 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 02:28:32,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:32,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 02:28:32,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:28:32,051 INFO L87 Difference]: Start difference. First operand 131 states and 167 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-06 02:28:32,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:32,139 INFO L93 Difference]: Finished difference Result 151 states and 193 transitions. [2021-05-06 02:28:32,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 02:28:32,139 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 69 [2021-05-06 02:28:32,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:32,140 INFO L225 Difference]: With dead ends: 151 [2021-05-06 02:28:32,140 INFO L226 Difference]: Without dead ends: 149 [2021-05-06 02:28:32,141 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.7ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:28:32,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-05-06 02:28:32,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 147. [2021-05-06 02:28:32,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 81 states have (on average 1.1728395061728396) internal successors, (95), 86 states have internal predecessors, (95), 48 states have call successors, (48), 18 states have call predecessors, (48), 17 states have return successors, (45), 42 states have call predecessors, (45), 45 states have call successors, (45) [2021-05-06 02:28:32,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 188 transitions. [2021-05-06 02:28:32,153 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 188 transitions. Word has length 69 [2021-05-06 02:28:32,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:32,153 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 188 transitions. [2021-05-06 02:28:32,153 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-06 02:28:32,154 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 188 transitions. [2021-05-06 02:28:32,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-06 02:28:32,154 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:32,154 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:28:32,368 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:32,369 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:32,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:32,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1872855628, now seen corresponding path program 2 times [2021-05-06 02:28:32,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:32,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146089086] [2021-05-06 02:28:32,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:32,376 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:32,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [103522214] [2021-05-06 02:28:32,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:32,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:28:32,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:28:32,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 02:28:32,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:32,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:32,549 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-05-06 02:28:32,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:32,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146089086] [2021-05-06 02:28:32,550 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:32,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103522214] [2021-05-06 02:28:32,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103522214] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:28:32,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:28:32,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 02:28:32,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930207871] [2021-05-06 02:28:32,550 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 02:28:32,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:32,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 02:28:32,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:28:32,551 INFO L87 Difference]: Start difference. First operand 147 states and 188 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-06 02:28:32,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:32,637 INFO L93 Difference]: Finished difference Result 166 states and 212 transitions. [2021-05-06 02:28:32,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 02:28:32,638 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 69 [2021-05-06 02:28:32,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:32,639 INFO L225 Difference]: With dead ends: 166 [2021-05-06 02:28:32,639 INFO L226 Difference]: Without dead ends: 161 [2021-05-06 02:28:32,640 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.2ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:28:32,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-05-06 02:28:32,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 160. [2021-05-06 02:28:32,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 89 states have (on average 1.1573033707865168) internal successors, (103), 94 states have internal predecessors, (103), 51 states have call successors, (51), 20 states have call predecessors, (51), 19 states have return successors, (48), 45 states have call predecessors, (48), 48 states have call successors, (48) [2021-05-06 02:28:32,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 202 transitions. [2021-05-06 02:28:32,653 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 202 transitions. Word has length 69 [2021-05-06 02:28:32,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:32,653 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 202 transitions. [2021-05-06 02:28:32,653 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-06 02:28:32,653 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 202 transitions. [2021-05-06 02:28:32,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-06 02:28:32,654 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:32,654 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 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] [2021-05-06 02:28:32,869 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:32,869 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:32,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:32,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1196252297, now seen corresponding path program 2 times [2021-05-06 02:28:32,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:32,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808871356] [2021-05-06 02:28:32,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:32,876 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:32,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1736064149] [2021-05-06 02:28:32,876 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:32,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:28:32,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:28:32,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-06 02:28:32,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:32,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:32,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:32,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:32,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:32,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:32,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:32,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:32,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:32,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:32,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:32,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:32,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:33,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:33,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:33,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:33,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:33,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:33,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:33,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:33,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:33,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:33,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:33,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:33,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:33,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:33,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:33,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:33,310 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 34 proven. 19 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-05-06 02:28:33,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:33,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808871356] [2021-05-06 02:28:33,310 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:33,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736064149] [2021-05-06 02:28:33,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736064149] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:28:33,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:28:33,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 02:28:33,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928468778] [2021-05-06 02:28:33,311 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 02:28:33,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:33,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 02:28:33,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:28:33,312 INFO L87 Difference]: Start difference. First operand 160 states and 202 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 02:28:33,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:33,880 INFO L93 Difference]: Finished difference Result 190 states and 241 transitions. [2021-05-06 02:28:33,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 02:28:33,880 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) Word has length 74 [2021-05-06 02:28:33,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:33,881 INFO L225 Difference]: With dead ends: 190 [2021-05-06 02:28:33,881 INFO L226 Difference]: Without dead ends: 188 [2021-05-06 02:28:33,882 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 237.4ms TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-05-06 02:28:33,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-05-06 02:28:33,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 184. [2021-05-06 02:28:33,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 104 states have (on average 1.1634615384615385) internal successors, (121), 109 states have internal predecessors, (121), 57 states have call successors, (57), 23 states have call predecessors, (57), 22 states have return successors, (54), 51 states have call predecessors, (54), 54 states have call successors, (54) [2021-05-06 02:28:33,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 232 transitions. [2021-05-06 02:28:33,895 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 232 transitions. Word has length 74 [2021-05-06 02:28:33,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:33,896 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 232 transitions. [2021-05-06 02:28:33,896 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 02:28:33,896 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 232 transitions. [2021-05-06 02:28:33,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-06 02:28:33,896 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:33,897 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:28:34,117 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-06 02:28:34,117 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:34,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:34,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1712511605, now seen corresponding path program 3 times [2021-05-06 02:28:34,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:34,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122333859] [2021-05-06 02:28:34,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:34,124 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:34,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [864818940] [2021-05-06 02:28:34,124 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:34,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 02:28:34,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:28:34,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-06 02:28:34,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:34,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:34,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:34,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:34,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:34,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:34,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:34,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:34,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:34,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:34,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:34,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:34,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:34,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:34,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:34,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:34,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:34,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:34,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:34,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:34,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:34,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:34,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:34,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:34,520 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 28 proven. 16 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-05-06 02:28:34,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:34,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122333859] [2021-05-06 02:28:34,520 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:34,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864818940] [2021-05-06 02:28:34,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864818940] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:28:34,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:28:34,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 02:28:34,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799984848] [2021-05-06 02:28:34,521 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 02:28:34,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:34,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 02:28:34,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:28:34,522 INFO L87 Difference]: Start difference. First operand 184 states and 232 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 02:28:35,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:35,228 INFO L93 Difference]: Finished difference Result 213 states and 266 transitions. [2021-05-06 02:28:35,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 02:28:35,229 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) Word has length 74 [2021-05-06 02:28:35,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:35,230 INFO L225 Difference]: With dead ends: 213 [2021-05-06 02:28:35,230 INFO L226 Difference]: Without dead ends: 211 [2021-05-06 02:28:35,231 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 170.4ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:28:35,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-05-06 02:28:35,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 197. [2021-05-06 02:28:35,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 114 states have (on average 1.1578947368421053) internal successors, (132), 119 states have internal predecessors, (132), 57 states have call successors, (57), 26 states have call predecessors, (57), 25 states have return successors, (54), 51 states have call predecessors, (54), 54 states have call successors, (54) [2021-05-06 02:28:35,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 243 transitions. [2021-05-06 02:28:35,247 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 243 transitions. Word has length 74 [2021-05-06 02:28:35,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:35,247 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 243 transitions. [2021-05-06 02:28:35,247 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 02:28:35,247 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 243 transitions. [2021-05-06 02:28:35,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-06 02:28:35,248 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:35,248 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:28:35,469 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-06 02:28:35,469 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:35,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:35,469 INFO L82 PathProgramCache]: Analyzing trace with hash 15858924, now seen corresponding path program 4 times [2021-05-06 02:28:35,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:35,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733598681] [2021-05-06 02:28:35,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:35,483 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:35,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [151152530] [2021-05-06 02:28:35,483 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:35,531 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 02:28:35,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:28:35,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-06 02:28:35,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:35,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:35,713 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 47 proven. 19 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-05-06 02:28:35,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:35,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733598681] [2021-05-06 02:28:35,713 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:35,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151152530] [2021-05-06 02:28:35,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151152530] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:28:35,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:28:35,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 02:28:35,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737327649] [2021-05-06 02:28:35,714 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 02:28:35,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:35,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 02:28:35,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:28:35,714 INFO L87 Difference]: Start difference. First operand 197 states and 243 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 02:28:36,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:36,016 INFO L93 Difference]: Finished difference Result 219 states and 272 transitions. [2021-05-06 02:28:36,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 02:28:36,017 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 79 [2021-05-06 02:28:36,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:36,018 INFO L225 Difference]: With dead ends: 219 [2021-05-06 02:28:36,018 INFO L226 Difference]: Without dead ends: 212 [2021-05-06 02:28:36,018 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 79.6ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-06 02:28:36,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-05-06 02:28:36,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 175. [2021-05-06 02:28:36,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 103 states have (on average 1.145631067961165) internal successors, (118), 107 states have internal predecessors, (118), 48 states have call successors, (48), 24 states have call predecessors, (48), 23 states have return successors, (45), 43 states have call predecessors, (45), 45 states have call successors, (45) [2021-05-06 02:28:36,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 211 transitions. [2021-05-06 02:28:36,031 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 211 transitions. Word has length 79 [2021-05-06 02:28:36,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:36,031 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 211 transitions. [2021-05-06 02:28:36,032 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 02:28:36,032 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 211 transitions. [2021-05-06 02:28:36,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-06 02:28:36,033 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:36,033 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:28:36,250 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-06 02:28:36,250 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:36,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:36,251 INFO L82 PathProgramCache]: Analyzing trace with hash 2066842922, now seen corresponding path program 3 times [2021-05-06 02:28:36,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:36,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041454064] [2021-05-06 02:28:36,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:36,256 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:36,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [306400456] [2021-05-06 02:28:36,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:36,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 02:28:36,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:28:36,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-06 02:28:36,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:36,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:36,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:36,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:36,459 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 30 proven. 21 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2021-05-06 02:28:36,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:36,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041454064] [2021-05-06 02:28:36,460 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:36,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306400456] [2021-05-06 02:28:36,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306400456] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:28:36,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:28:36,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 02:28:36,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106402295] [2021-05-06 02:28:36,460 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 02:28:36,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:36,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 02:28:36,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:28:36,461 INFO L87 Difference]: Start difference. First operand 175 states and 211 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 02:28:40,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:40,929 INFO L93 Difference]: Finished difference Result 200 states and 251 transitions. [2021-05-06 02:28:40,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 02:28:40,929 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 79 [2021-05-06 02:28:40,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:40,930 INFO L225 Difference]: With dead ends: 200 [2021-05-06 02:28:40,930 INFO L226 Difference]: Without dead ends: 194 [2021-05-06 02:28:40,931 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 66.2ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-06 02:28:40,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-05-06 02:28:40,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 191. [2021-05-06 02:28:40,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 112 states have (on average 1.1607142857142858) internal successors, (130), 116 states have internal predecessors, (130), 54 states have call successors, (54), 25 states have call predecessors, (54), 24 states have return successors, (51), 49 states have call predecessors, (51), 51 states have call successors, (51) [2021-05-06 02:28:40,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 235 transitions. [2021-05-06 02:28:40,955 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 235 transitions. Word has length 79 [2021-05-06 02:28:40,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:40,955 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 235 transitions. [2021-05-06 02:28:40,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 02:28:40,955 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 235 transitions. [2021-05-06 02:28:40,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-06 02:28:40,956 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:40,956 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:28:41,168 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:41,169 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:41,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:41,169 INFO L82 PathProgramCache]: Analyzing trace with hash -105752765, now seen corresponding path program 5 times [2021-05-06 02:28:41,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:41,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537534645] [2021-05-06 02:28:41,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:41,178 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:41,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1708095505] [2021-05-06 02:28:41,178 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:41,491 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-06 02:28:41,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:28:41,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 02:28:41,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:41,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:41,609 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2021-05-06 02:28:41,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:41,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537534645] [2021-05-06 02:28:41,610 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:41,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708095505] [2021-05-06 02:28:41,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708095505] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:28:41,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:28:41,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 02:28:41,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074550753] [2021-05-06 02:28:41,610 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 02:28:41,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:41,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 02:28:41,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:28:41,611 INFO L87 Difference]: Start difference. First operand 191 states and 235 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-06 02:28:41,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:41,679 INFO L93 Difference]: Finished difference Result 223 states and 282 transitions. [2021-05-06 02:28:41,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 02:28:41,680 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 87 [2021-05-06 02:28:41,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:41,681 INFO L225 Difference]: With dead ends: 223 [2021-05-06 02:28:41,681 INFO L226 Difference]: Without dead ends: 221 [2021-05-06 02:28:41,681 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.5ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:28:41,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-05-06 02:28:41,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 208. [2021-05-06 02:28:41,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 119 states have (on average 1.1680672268907564) internal successors, (139), 124 states have internal predecessors, (139), 63 states have call successors, (63), 26 states have call predecessors, (63), 25 states have return successors, (60), 57 states have call predecessors, (60), 60 states have call successors, (60) [2021-05-06 02:28:41,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 262 transitions. [2021-05-06 02:28:41,700 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 262 transitions. Word has length 87 [2021-05-06 02:28:41,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:41,700 INFO L480 AbstractCegarLoop]: Abstraction has 208 states and 262 transitions. [2021-05-06 02:28:41,701 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-06 02:28:41,701 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 262 transitions. [2021-05-06 02:28:41,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-06 02:28:41,702 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:41,702 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:28:41,918 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-06 02:28:41,919 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:41,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:41,919 INFO L82 PathProgramCache]: Analyzing trace with hash -297024573, now seen corresponding path program 6 times [2021-05-06 02:28:41,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:41,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250956872] [2021-05-06 02:28:41,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:41,924 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:41,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [975063496] [2021-05-06 02:28:41,924 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:41,992 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-06 02:28:41,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:28:41,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-06 02:28:41,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:42,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:42,124 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2021-05-06 02:28:42,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:42,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250956872] [2021-05-06 02:28:42,125 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:42,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975063496] [2021-05-06 02:28:42,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975063496] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:28:42,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:28:42,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 02:28:42,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998951672] [2021-05-06 02:28:42,125 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:28:42,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:42,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:28:42,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:28:42,126 INFO L87 Difference]: Start difference. First operand 208 states and 262 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-06 02:28:42,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:42,259 INFO L93 Difference]: Finished difference Result 233 states and 296 transitions. [2021-05-06 02:28:42,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 02:28:42,259 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 87 [2021-05-06 02:28:42,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:42,260 INFO L225 Difference]: With dead ends: 233 [2021-05-06 02:28:42,260 INFO L226 Difference]: Without dead ends: 228 [2021-05-06 02:28:42,261 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.4ms TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:28:42,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-05-06 02:28:42,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 227. [2021-05-06 02:28:42,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 130 states have (on average 1.1615384615384616) internal successors, (151), 135 states have internal predecessors, (151), 69 states have call successors, (69), 28 states have call predecessors, (69), 27 states have return successors, (66), 63 states have call predecessors, (66), 66 states have call successors, (66) [2021-05-06 02:28:42,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 286 transitions. [2021-05-06 02:28:42,278 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 286 transitions. Word has length 87 [2021-05-06 02:28:42,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:42,279 INFO L480 AbstractCegarLoop]: Abstraction has 227 states and 286 transitions. [2021-05-06 02:28:42,280 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-06 02:28:42,280 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 286 transitions. [2021-05-06 02:28:42,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-06 02:28:42,280 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:42,280 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:28:42,497 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-06 02:28:42,497 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:42,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:42,498 INFO L82 PathProgramCache]: Analyzing trace with hash -239766271, now seen corresponding path program 7 times [2021-05-06 02:28:42,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:42,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199474139] [2021-05-06 02:28:42,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:42,503 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:42,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [725705049] [2021-05-06 02:28:42,503 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:42,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:28:42,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-06 02:28:42,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:42,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:42,700 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2021-05-06 02:28:42,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:42,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199474139] [2021-05-06 02:28:42,700 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:42,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725705049] [2021-05-06 02:28:42,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725705049] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:28:42,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:28:42,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 02:28:42,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137851096] [2021-05-06 02:28:42,702 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:28:42,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:42,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:28:42,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:28:42,703 INFO L87 Difference]: Start difference. First operand 227 states and 286 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-06 02:28:42,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:42,949 INFO L93 Difference]: Finished difference Result 243 states and 309 transitions. [2021-05-06 02:28:42,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 02:28:42,950 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 87 [2021-05-06 02:28:42,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:42,952 INFO L225 Difference]: With dead ends: 243 [2021-05-06 02:28:42,952 INFO L226 Difference]: Without dead ends: 241 [2021-05-06 02:28:42,952 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 53.7ms TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:28:42,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-05-06 02:28:42,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 239. [2021-05-06 02:28:42,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 135 states have (on average 1.162962962962963) internal successors, (157), 141 states have internal predecessors, (157), 75 states have call successors, (75), 29 states have call predecessors, (75), 28 states have return successors, (72), 68 states have call predecessors, (72), 72 states have call successors, (72) [2021-05-06 02:28:42,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 304 transitions. [2021-05-06 02:28:42,972 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 304 transitions. Word has length 87 [2021-05-06 02:28:42,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:42,972 INFO L480 AbstractCegarLoop]: Abstraction has 239 states and 304 transitions. [2021-05-06 02:28:42,973 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-06 02:28:42,973 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 304 transitions. [2021-05-06 02:28:42,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-06 02:28:42,973 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:42,973 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:28:43,189 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-06 02:28:43,189 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:43,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:43,189 INFO L82 PathProgramCache]: Analyzing trace with hash 85135427, now seen corresponding path program 8 times [2021-05-06 02:28:43,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:43,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560930122] [2021-05-06 02:28:43,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:43,199 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:43,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1397027824] [2021-05-06 02:28:43,199 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:43,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:28:43,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:28:43,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-06 02:28:43,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:43,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:43,411 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2021-05-06 02:28:43,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:43,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560930122] [2021-05-06 02:28:43,411 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:43,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397027824] [2021-05-06 02:28:43,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397027824] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:28:43,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:28:43,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 02:28:43,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630300298] [2021-05-06 02:28:43,412 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:28:43,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:43,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:28:43,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:28:43,412 INFO L87 Difference]: Start difference. First operand 239 states and 304 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-06 02:28:43,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:43,545 INFO L93 Difference]: Finished difference Result 254 states and 325 transitions. [2021-05-06 02:28:43,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 02:28:43,546 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 87 [2021-05-06 02:28:43,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:43,547 INFO L225 Difference]: With dead ends: 254 [2021-05-06 02:28:43,547 INFO L226 Difference]: Without dead ends: 249 [2021-05-06 02:28:43,547 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 51.4ms TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:28:43,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-05-06 02:28:43,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 239. [2021-05-06 02:28:43,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 135 states have (on average 1.162962962962963) internal successors, (157), 141 states have internal predecessors, (157), 75 states have call successors, (75), 29 states have call predecessors, (75), 28 states have return successors, (72), 68 states have call predecessors, (72), 72 states have call successors, (72) [2021-05-06 02:28:43,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 304 transitions. [2021-05-06 02:28:43,566 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 304 transitions. Word has length 87 [2021-05-06 02:28:43,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:43,566 INFO L480 AbstractCegarLoop]: Abstraction has 239 states and 304 transitions. [2021-05-06 02:28:43,566 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-06 02:28:43,566 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 304 transitions. [2021-05-06 02:28:43,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-06 02:28:43,567 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:43,567 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:28:43,780 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:43,781 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:43,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:43,781 INFO L82 PathProgramCache]: Analyzing trace with hash 142393729, now seen corresponding path program 9 times [2021-05-06 02:28:43,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:43,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512415859] [2021-05-06 02:28:43,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:43,786 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:43,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1760669789] [2021-05-06 02:28:43,786 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:43,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 02:28:43,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:28:43,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 02:28:43,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:43,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:43,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:43,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:43,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:43,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:43,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:43,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:43,984 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 49 proven. 7 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2021-05-06 02:28:43,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:43,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512415859] [2021-05-06 02:28:43,984 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:43,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760669789] [2021-05-06 02:28:43,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760669789] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:28:43,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:28:43,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 02:28:43,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483300031] [2021-05-06 02:28:43,985 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 02:28:43,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:43,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 02:28:43,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:28:43,985 INFO L87 Difference]: Start difference. First operand 239 states and 304 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-05-06 02:28:44,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:44,068 INFO L93 Difference]: Finished difference Result 245 states and 309 transitions. [2021-05-06 02:28:44,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 02:28:44,069 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 87 [2021-05-06 02:28:44,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:44,070 INFO L225 Difference]: With dead ends: 245 [2021-05-06 02:28:44,070 INFO L226 Difference]: Without dead ends: 240 [2021-05-06 02:28:44,070 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 26.2ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:28:44,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-05-06 02:28:44,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 237. [2021-05-06 02:28:44,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 137 states have (on average 1.145985401459854) internal successors, (157), 143 states have internal predecessors, (157), 70 states have call successors, (70), 30 states have call predecessors, (70), 29 states have return successors, (68), 63 states have call predecessors, (68), 68 states have call successors, (68) [2021-05-06 02:28:44,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 295 transitions. [2021-05-06 02:28:44,090 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 295 transitions. Word has length 87 [2021-05-06 02:28:44,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:44,090 INFO L480 AbstractCegarLoop]: Abstraction has 237 states and 295 transitions. [2021-05-06 02:28:44,090 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-05-06 02:28:44,091 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 295 transitions. [2021-05-06 02:28:44,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-06 02:28:44,091 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:44,091 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:28:44,308 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:44,309 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:44,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:44,309 INFO L82 PathProgramCache]: Analyzing trace with hash 418671986, now seen corresponding path program 3 times [2021-05-06 02:28:44,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:44,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196150382] [2021-05-06 02:28:44,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:44,319 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:44,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1631867454] [2021-05-06 02:28:44,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:44,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 02:28:44,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:28:44,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-06 02:28:44,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:44,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:44,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:44,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:44,548 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 69 proven. 14 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2021-05-06 02:28:44,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:44,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196150382] [2021-05-06 02:28:44,548 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:44,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631867454] [2021-05-06 02:28:44,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631867454] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:28:44,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:28:44,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 02:28:44,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700802819] [2021-05-06 02:28:44,549 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 02:28:44,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:44,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 02:28:44,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:28:44,549 INFO L87 Difference]: Start difference. First operand 237 states and 295 transitions. Second operand has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 02:28:44,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:44,731 INFO L93 Difference]: Finished difference Result 271 states and 338 transitions. [2021-05-06 02:28:44,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 02:28:44,731 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 92 [2021-05-06 02:28:44,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:44,733 INFO L225 Difference]: With dead ends: 271 [2021-05-06 02:28:44,733 INFO L226 Difference]: Without dead ends: 269 [2021-05-06 02:28:44,733 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 69.1ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:28:44,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-05-06 02:28:44,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 228. [2021-05-06 02:28:44,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 136 states have (on average 1.1397058823529411) internal successors, (155), 141 states have internal predecessors, (155), 61 states have call successors, (61), 31 states have call predecessors, (61), 30 states have return successors, (59), 55 states have call predecessors, (59), 59 states have call successors, (59) [2021-05-06 02:28:44,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 275 transitions. [2021-05-06 02:28:44,752 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 275 transitions. Word has length 92 [2021-05-06 02:28:44,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:44,753 INFO L480 AbstractCegarLoop]: Abstraction has 228 states and 275 transitions. [2021-05-06 02:28:44,753 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 02:28:44,753 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 275 transitions. [2021-05-06 02:28:44,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-06 02:28:44,753 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:44,753 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 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] [2021-05-06 02:28:44,968 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-06 02:28:44,969 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:44,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:44,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1804875380, now seen corresponding path program 10 times [2021-05-06 02:28:44,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:44,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980566573] [2021-05-06 02:28:44,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:44,974 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:44,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [827320864] [2021-05-06 02:28:44,974 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:45,069 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 02:28:45,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:28:45,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 60 conjunts are in the unsatisfiable core [2021-05-06 02:28:45,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:45,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:45,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:45,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:45,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:45,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:45,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:45,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:45,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:45,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:45,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:45,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:45,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:45,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:45,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:45,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:45,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:45,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:45,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:45,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:45,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:45,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:45,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:45,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:45,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:45,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:45,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:45,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:45,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:45,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:45,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:45,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:45,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:45,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:45,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:45,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:45,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:45,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:45,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:45,429 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 67 proven. 61 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2021-05-06 02:28:45,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:45,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980566573] [2021-05-06 02:28:45,430 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:45,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827320864] [2021-05-06 02:28:45,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827320864] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:28:45,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:28:45,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 02:28:45,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836262881] [2021-05-06 02:28:45,430 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 02:28:45,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:45,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 02:28:45,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:28:45,431 INFO L87 Difference]: Start difference. First operand 228 states and 275 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 11 states have internal predecessors, (30), 6 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-06 02:28:46,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:46,107 INFO L93 Difference]: Finished difference Result 258 states and 314 transitions. [2021-05-06 02:28:46,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 02:28:46,108 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 11 states have internal predecessors, (30), 6 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 92 [2021-05-06 02:28:46,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:46,109 INFO L225 Difference]: With dead ends: 258 [2021-05-06 02:28:46,109 INFO L226 Difference]: Without dead ends: 256 [2021-05-06 02:28:46,109 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 76 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 155.3ms TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-05-06 02:28:46,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-05-06 02:28:46,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 242. [2021-05-06 02:28:46,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 145 states have (on average 1.1379310344827587) internal successors, (165), 150 states have internal predecessors, (165), 64 states have call successors, (64), 33 states have call predecessors, (64), 32 states have return successors, (62), 58 states have call predecessors, (62), 62 states have call successors, (62) [2021-05-06 02:28:46,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 291 transitions. [2021-05-06 02:28:46,127 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 291 transitions. Word has length 92 [2021-05-06 02:28:46,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:46,127 INFO L480 AbstractCegarLoop]: Abstraction has 242 states and 291 transitions. [2021-05-06 02:28:46,127 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 11 states have internal predecessors, (30), 6 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-06 02:28:46,128 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 291 transitions. [2021-05-06 02:28:46,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-06 02:28:46,128 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:46,128 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 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] [2021-05-06 02:28:46,345 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-06 02:28:46,345 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:46,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:46,345 INFO L82 PathProgramCache]: Analyzing trace with hash 65583604, now seen corresponding path program 11 times [2021-05-06 02:28:46,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:46,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786114708] [2021-05-06 02:28:46,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:46,351 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:46,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1825703078] [2021-05-06 02:28:46,351 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:49,806 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-06 02:28:49,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:28:49,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-06 02:28:49,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:49,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:49,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:49,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:49,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:49,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:49,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:49,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:49,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:49,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:49,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:49,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:49,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:49,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:49,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:50,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:50,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:50,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:50,024 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 20 proven. 27 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2021-05-06 02:28:50,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:50,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786114708] [2021-05-06 02:28:50,024 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:50,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825703078] [2021-05-06 02:28:50,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825703078] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:28:50,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:28:50,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 02:28:50,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494993658] [2021-05-06 02:28:50,024 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 02:28:50,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:50,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 02:28:50,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:28:50,025 INFO L87 Difference]: Start difference. First operand 242 states and 291 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 02:28:50,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:50,304 INFO L93 Difference]: Finished difference Result 270 states and 327 transitions. [2021-05-06 02:28:50,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 02:28:50,305 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 92 [2021-05-06 02:28:50,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:50,306 INFO L225 Difference]: With dead ends: 270 [2021-05-06 02:28:50,306 INFO L226 Difference]: Without dead ends: 268 [2021-05-06 02:28:50,306 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 71.5ms TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:28:50,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-05-06 02:28:50,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 244. [2021-05-06 02:28:50,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 147 states have (on average 1.1360544217687074) internal successors, (167), 151 states have internal predecessors, (167), 63 states have call successors, (63), 34 states have call predecessors, (63), 33 states have return successors, (61), 58 states have call predecessors, (61), 61 states have call successors, (61) [2021-05-06 02:28:50,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 291 transitions. [2021-05-06 02:28:50,335 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 291 transitions. Word has length 92 [2021-05-06 02:28:50,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:50,335 INFO L480 AbstractCegarLoop]: Abstraction has 244 states and 291 transitions. [2021-05-06 02:28:50,335 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 02:28:50,335 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 291 transitions. [2021-05-06 02:28:50,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-06 02:28:50,336 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:50,336 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 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] [2021-05-06 02:28:50,542 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:50,542 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:50,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:50,542 INFO L82 PathProgramCache]: Analyzing trace with hash 1451786998, now seen corresponding path program 12 times [2021-05-06 02:28:50,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:50,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317361353] [2021-05-06 02:28:50,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:50,547 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:50,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [189986661] [2021-05-06 02:28:50,547 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:50,992 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-06 02:28:50,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:28:50,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-06 02:28:50,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:51,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:51,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:51,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:51,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:51,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:51,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:51,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:51,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:51,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:51,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:51,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:51,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:51,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:51,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:51,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:51,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:51,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:51,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:51,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:51,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:51,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:51,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:51,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:51,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:51,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:51,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:51,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:51,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:51,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:51,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:51,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:51,351 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 87 proven. 12 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2021-05-06 02:28:51,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:51,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317361353] [2021-05-06 02:28:51,351 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:51,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189986661] [2021-05-06 02:28:51,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189986661] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:28:51,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:28:51,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-06 02:28:51,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300519274] [2021-05-06 02:28:51,352 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 02:28:51,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:51,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 02:28:51,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-05-06 02:28:51,352 INFO L87 Difference]: Start difference. First operand 244 states and 291 transitions. Second operand has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 12 states have internal predecessors, (29), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 02:28:52,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:52,083 INFO L93 Difference]: Finished difference Result 317 states and 395 transitions. [2021-05-06 02:28:52,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 02:28:52,083 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 12 states have internal predecessors, (29), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) Word has length 92 [2021-05-06 02:28:52,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:52,085 INFO L225 Difference]: With dead ends: 317 [2021-05-06 02:28:52,085 INFO L226 Difference]: Without dead ends: 311 [2021-05-06 02:28:52,085 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 297.7ms TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-05-06 02:28:52,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-05-06 02:28:52,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 254. [2021-05-06 02:28:52,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 153 states have (on average 1.1241830065359477) internal successors, (172), 158 states have internal predecessors, (172), 65 states have call successors, (65), 36 states have call predecessors, (65), 35 states have return successors, (63), 59 states have call predecessors, (63), 63 states have call successors, (63) [2021-05-06 02:28:52,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 300 transitions. [2021-05-06 02:28:52,106 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 300 transitions. Word has length 92 [2021-05-06 02:28:52,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:52,106 INFO L480 AbstractCegarLoop]: Abstraction has 254 states and 300 transitions. [2021-05-06 02:28:52,106 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 12 states have internal predecessors, (29), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 02:28:52,106 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 300 transitions. [2021-05-06 02:28:52,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-05-06 02:28:52,107 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:52,107 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:28:52,312 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-06 02:28:52,313 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:52,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:52,313 INFO L82 PathProgramCache]: Analyzing trace with hash -87157341, now seen corresponding path program 13 times [2021-05-06 02:28:52,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:52,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449069458] [2021-05-06 02:28:52,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:52,320 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:52,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2134210060] [2021-05-06 02:28:52,320 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:52,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:28:52,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 46 conjunts are in the unsatisfiable core [2021-05-06 02:28:52,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:52,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:52,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:52,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:52,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:59,892 WARN L205 SmtUtils]: Spent 2.08 s on a formula simplification. DAG size of input: 26 DAG size of output: 21 [2021-05-06 02:28:59,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:59,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:59,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:59,914 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 55 proven. 69 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2021-05-06 02:28:59,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:59,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449069458] [2021-05-06 02:28:59,915 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:59,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134210060] [2021-05-06 02:28:59,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134210060] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:28:59,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:28:59,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 02:28:59,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829070274] [2021-05-06 02:28:59,915 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 02:28:59,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:59,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 02:28:59,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-05-06 02:28:59,916 INFO L87 Difference]: Start difference. First operand 254 states and 300 transitions. Second operand has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-06 02:29:04,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:29:04,679 INFO L93 Difference]: Finished difference Result 298 states and 360 transitions. [2021-05-06 02:29:04,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 02:29:04,680 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) Word has length 97 [2021-05-06 02:29:04,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:29:04,681 INFO L225 Difference]: With dead ends: 298 [2021-05-06 02:29:04,681 INFO L226 Difference]: Without dead ends: 288 [2021-05-06 02:29:04,681 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 7424.1ms TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-05-06 02:29:04,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-05-06 02:29:04,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 288. [2021-05-06 02:29:04,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 174 states have (on average 1.1264367816091954) internal successors, (196), 179 states have internal predecessors, (196), 74 states have call successors, (74), 40 states have call predecessors, (74), 39 states have return successors, (72), 68 states have call predecessors, (72), 72 states have call successors, (72) [2021-05-06 02:29:04,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 342 transitions. [2021-05-06 02:29:04,705 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 342 transitions. Word has length 97 [2021-05-06 02:29:04,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:29:04,705 INFO L480 AbstractCegarLoop]: Abstraction has 288 states and 342 transitions. [2021-05-06 02:29:04,705 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-06 02:29:04,705 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 342 transitions. [2021-05-06 02:29:04,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-05-06 02:29:04,706 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:29:04,706 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:29:04,922 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:29:04,922 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:29:04,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:29:04,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1963826657, now seen corresponding path program 14 times [2021-05-06 02:29:04,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:29:04,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379354371] [2021-05-06 02:29:04,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:29:04,929 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:29:04,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [282162218] [2021-05-06 02:29:04,929 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:29:04,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:29:04,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:29:04,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 50 conjunts are in the unsatisfiable core [2021-05-06 02:29:04,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:29:05,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:05,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:05,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:05,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:05,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:05,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:05,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:05,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:05,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:05,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:05,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:05,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:05,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:05,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:05,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:05,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:05,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:05,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:05,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:05,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:05,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:05,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:05,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:05,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:05,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:05,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:05,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:05,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:05,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:05,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:05,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:05,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:05,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:05,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:05,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:05,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:05,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:05,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:05,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:05,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:05,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:05,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:05,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:05,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:05,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:05,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:05,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:05,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:05,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:05,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:05,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:05,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:05,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:05,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:05,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:05,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:05,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:06,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:06,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:06,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:06,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:06,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:06,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:06,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:06,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:24,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:24,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:24,309 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 1624 DAG size of output: 1491 [2021-05-06 02:30:24,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:24,604 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 1563 DAG size of output: 1431 [2021-05-06 02:30:24,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:25,124 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 2117 DAG size of output: 2062 [2021-05-06 02:30:25,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:25,824 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 1763 DAG size of output: 1548