/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_valuebound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 14:48:57,921 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 14:48:57,922 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 14:48:57,950 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 14:48:57,956 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 14:48:57,957 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 14:48:57,958 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 14:48:57,958 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 14:48:57,959 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 14:48:57,960 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 14:48:57,961 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 14:48:57,962 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 14:48:57,963 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 14:48:57,964 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 14:48:57,965 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 14:48:57,965 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 14:48:57,967 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 14:48:57,972 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 14:48:57,973 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 14:48:57,973 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 14:48:57,977 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 [2021-05-02 14:48:57,995 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 14:48:57,995 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 14:48:57,996 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 14:48:57,996 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 14:48:57,996 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 14:48:57,996 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 14:48:57,996 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 14:48:57,996 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 14:48:57,997 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 14:48:57,997 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 14:48:57,997 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 14:48:57,997 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 14:48:57,997 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 14:48:57,997 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 14:48:57,997 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 14:48:57,997 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 14:48:57,997 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 14:48:57,997 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 14:48:57,998 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 14:48:57,998 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 14:48:57,998 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 14:48:57,998 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 14:48:57,998 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 14:48:57,998 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 14:48:57,998 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 14:48:57,998 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 14:48:57,998 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 14:48:57,998 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 14:48:57,999 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 14:48:58,252 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 14:48:58,269 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 14:48:58,271 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 14:48:58,271 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 14:48:58,273 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 14:48:58,273 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_valuebound5.c [2021-05-02 14:48:58,328 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/465885db8/dfa2d385b3914c8a83290b3829f76fc9/FLAG187494356 [2021-05-02 14:48:58,669 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 14:48:58,669 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_valuebound5.c [2021-05-02 14:48:58,674 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/465885db8/dfa2d385b3914c8a83290b3829f76fc9/FLAG187494356 [2021-05-02 14:48:58,684 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/465885db8/dfa2d385b3914c8a83290b3829f76fc9 [2021-05-02 14:48:58,686 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 14:48:58,687 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 14:48:58,693 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 14:48:58,693 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 14:48:58,695 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 14:48:58,695 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 02:48:58" (1/1) ... [2021-05-02 14:48:58,696 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@767c0870 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:48:58, skipping insertion in model container [2021-05-02 14:48:58,696 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 02:48:58" (1/1) ... [2021-05-02 14:48:58,700 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 14:48:58,709 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 14:48:58,788 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_valuebound5.c[489,502] [2021-05-02 14:48:58,797 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 14:48:58,802 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 14:48:58,809 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_valuebound5.c[489,502] [2021-05-02 14:48:58,814 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 14:48:58,822 INFO L208 MainTranslator]: Completed translation [2021-05-02 14:48:58,823 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:48:58 WrapperNode [2021-05-02 14:48:58,823 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 14:48:58,824 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 14:48:58,824 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 14:48:58,824 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 14:48:58,832 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:48:58" (1/1) ... [2021-05-02 14:48:58,833 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:48:58" (1/1) ... [2021-05-02 14:48:58,850 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:48:58" (1/1) ... [2021-05-02 14:48:58,850 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:48:58" (1/1) ... [2021-05-02 14:48:58,900 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:48:58" (1/1) ... [2021-05-02 14:48:58,903 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:48:58" (1/1) ... [2021-05-02 14:48:58,904 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:48:58" (1/1) ... [2021-05-02 14:48:58,905 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 14:48:58,905 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 14:48:58,905 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 14:48:58,905 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 14:48:58,906 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:48:58" (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 [2021-05-02 14:48:58,965 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 14:48:58,965 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 14:48:58,965 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 14:48:58,966 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 14:48:58,966 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 14:48:58,966 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 14:48:58,966 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 14:48:58,967 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 14:48:58,967 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 14:48:58,967 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 14:48:58,967 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 14:48:58,967 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 14:48:58,968 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 14:48:58,968 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 14:48:58,968 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 14:48:58,968 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 14:48:58,968 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 14:48:58,968 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 14:48:58,968 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 14:48:58,968 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 14:48:59,222 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 14:48:59,222 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 14:48:59,223 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 02:48:59 BoogieIcfgContainer [2021-05-02 14:48:59,223 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 14:48:59,224 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 14:48:59,224 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 14:48:59,226 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 14:48:59,226 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 02:48:58" (1/3) ... [2021-05-02 14:48:59,227 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@124d2c0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 02:48:59, skipping insertion in model container [2021-05-02 14:48:59,227 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:48:58" (2/3) ... [2021-05-02 14:48:59,227 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@124d2c0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 02:48:59, skipping insertion in model container [2021-05-02 14:48:59,227 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 02:48:59" (3/3) ... [2021-05-02 14:48:59,228 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd-ll_valuebound5.c [2021-05-02 14:48:59,231 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 14:48:59,234 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 14:48:59,244 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 14:48:59,265 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 14:48:59,265 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 14:48:59,265 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 14:48:59,265 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 14:48:59,265 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 14:48:59,265 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 14:48:59,266 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 14:48:59,266 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 14:48:59,287 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) [2021-05-02 14:48:59,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 14:48:59,291 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:48:59,291 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] [2021-05-02 14:48:59,291 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:48:59,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:48:59,295 INFO L82 PathProgramCache]: Analyzing trace with hash 870870740, now seen corresponding path program 1 times [2021-05-02 14:48:59,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:48:59,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594305696] [2021-05-02 14:48:59,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:48:59,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:48:59,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 14:48:59,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:48:59,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 14:48:59,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:48:59,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 14:48:59,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:48:59,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 14:48:59,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:48:59,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 14:48:59,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:48:59,488 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 14:48:59,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:48:59,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594305696] [2021-05-02 14:48:59,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594305696] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:48:59,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:48:59,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 14:48:59,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008349930] [2021-05-02 14:48:59,492 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 14:48:59,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:48:59,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 14:48:59,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:48:59,501 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) [2021-05-02 14:48:59,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:48:59,617 INFO L93 Difference]: Finished difference Result 67 states and 105 transitions. [2021-05-02 14:48:59,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 14:48:59,624 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 [2021-05-02 14:48:59,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:48:59,629 INFO L225 Difference]: With dead ends: 67 [2021-05-02 14:48:59,629 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 14:48:59,631 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:48:59,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 14:48:59,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-02 14:48:59,656 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) [2021-05-02 14:48:59,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2021-05-02 14:48:59,658 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 33 [2021-05-02 14:48:59,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:48:59,658 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2021-05-02 14:48:59,658 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) [2021-05-02 14:48:59,658 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2021-05-02 14:48:59,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 14:48:59,659 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:48:59,659 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] [2021-05-02 14:48:59,660 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 14:48:59,660 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:48:59,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:48:59,660 INFO L82 PathProgramCache]: Analyzing trace with hash -1006914976, now seen corresponding path program 1 times [2021-05-02 14:48:59,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:48:59,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517259974] [2021-05-02 14:48:59,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:48:59,675 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:48:59,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [777870170] [2021-05-02 14:48:59,675 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 [2021-05-02 14:48:59,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:48:59,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 14:48:59,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:48:59,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:59,873 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 14:48:59,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:48:59,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517259974] [2021-05-02 14:48:59,874 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:48:59,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777870170] [2021-05-02 14:48:59,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777870170] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:48:59,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:48:59,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 14:48:59,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625364670] [2021-05-02 14:48:59,875 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 14:48:59,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:48:59,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 14:48:59,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 14:48:59,876 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-02 14:48:59,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:48:59,984 INFO L93 Difference]: Finished difference Result 48 states and 65 transitions. [2021-05-02 14:48:59,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 14:48:59,985 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 33 [2021-05-02 14:48:59,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:48:59,988 INFO L225 Difference]: With dead ends: 48 [2021-05-02 14:48:59,988 INFO L226 Difference]: Without dead ends: 46 [2021-05-02 14:48:59,989 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 35.5ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:48:59,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-02 14:48:59,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2021-05-02 14:48:59,998 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) [2021-05-02 14:48:59,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2021-05-02 14:48:59,999 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 33 [2021-05-02 14:48:59,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:48:59,999 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2021-05-02 14:48:59,999 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-02 14:49:00,000 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2021-05-02 14:49:00,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 14:49:00,000 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:49:00,000 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] [2021-05-02 14:49:00,217 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 14:49:00,218 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:49:00,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:49:00,218 INFO L82 PathProgramCache]: Analyzing trace with hash -124657161, now seen corresponding path program 1 times [2021-05-02 14:49:00,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:49:00,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83570207] [2021-05-02 14:49:00,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:49:00,243 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:49:00,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1893832590] [2021-05-02 14:49:00,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-02 14:49:00,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:49:00,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 14:49:00,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:49:00,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:00,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:00,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:00,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:00,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:00,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:00,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:00,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:00,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:00,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:00,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:00,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:00,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:00,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:00,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:00,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:00,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:00,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:00,551 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 14:49:00,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:49:00,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83570207] [2021-05-02 14:49:00,551 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:49:00,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893832590] [2021-05-02 14:49:00,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893832590] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:49:00,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:49:00,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 14:49:00,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313191604] [2021-05-02 14:49:00,552 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 14:49:00,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:49:00,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 14:49:00,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:49:00,553 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2021-05-02 14:49:00,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:49:00,663 INFO L93 Difference]: Finished difference Result 70 states and 102 transitions. [2021-05-02 14:49:00,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 14:49:00,664 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 38 [2021-05-02 14:49:00,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:49:00,668 INFO L225 Difference]: With dead ends: 70 [2021-05-02 14:49:00,668 INFO L226 Difference]: Without dead ends: 68 [2021-05-02 14:49:00,669 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 75.9ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-02 14:49:00,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-02 14:49:00,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 61. [2021-05-02 14:49:00,678 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) [2021-05-02 14:49:00,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 87 transitions. [2021-05-02 14:49:00,680 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 87 transitions. Word has length 38 [2021-05-02 14:49:00,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:49:00,680 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 87 transitions. [2021-05-02 14:49:00,680 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2021-05-02 14:49:00,680 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 87 transitions. [2021-05-02 14:49:00,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-02 14:49:00,681 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:49:00,681 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] [2021-05-02 14:49:00,886 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:49:00,886 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:49:00,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:49:00,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1732898944, now seen corresponding path program 1 times [2021-05-02 14:49:00,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:49:00,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775583393] [2021-05-02 14:49:00,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:49:00,896 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:49:00,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1190187607] [2021-05-02 14:49:00,897 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 [2021-05-02 14:49:00,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:49:00,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 14:49:00,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:49:01,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:01,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:01,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:01,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:01,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:01,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:01,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:01,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:01,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:01,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:01,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:01,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:01,127 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 14:49:01,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:49:01,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775583393] [2021-05-02 14:49:01,127 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:49:01,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190187607] [2021-05-02 14:49:01,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190187607] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:49:01,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:49:01,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 14:49:01,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802776289] [2021-05-02 14:49:01,129 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 14:49:01,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:49:01,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 14:49:01,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:49:01,130 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) [2021-05-02 14:49:01,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:49:01,239 INFO L93 Difference]: Finished difference Result 68 states and 93 transitions. [2021-05-02 14:49:01,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 14:49:01,239 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 [2021-05-02 14:49:01,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:49:01,241 INFO L225 Difference]: With dead ends: 68 [2021-05-02 14:49:01,241 INFO L226 Difference]: Without dead ends: 64 [2021-05-02 14:49:01,246 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 42.6ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:49:01,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-02 14:49:01,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-05-02 14:49:01,258 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) [2021-05-02 14:49:01,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 87 transitions. [2021-05-02 14:49:01,268 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 87 transitions. Word has length 43 [2021-05-02 14:49:01,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:49:01,270 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 87 transitions. [2021-05-02 14:49:01,270 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) [2021-05-02 14:49:01,270 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 87 transitions. [2021-05-02 14:49:01,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-02 14:49:01,271 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:49:01,271 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] [2021-05-02 14:49:01,472 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:49:01,473 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:49:01,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:49:01,474 INFO L82 PathProgramCache]: Analyzing trace with hash -301191846, now seen corresponding path program 1 times [2021-05-02 14:49:01,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:49:01,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154622088] [2021-05-02 14:49:01,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:49:01,485 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:49:01,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1769990882] [2021-05-02 14:49:01,485 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 [2021-05-02 14:49:01,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:49:01,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-02 14:49:01,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:49:01,596 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-05-02 14:49:01,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:49:01,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154622088] [2021-05-02 14:49:01,596 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:49:01,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769990882] [2021-05-02 14:49:01,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769990882] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:49:01,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:49:01,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 14:49:01,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028594965] [2021-05-02 14:49:01,597 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 14:49:01,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:49:01,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 14:49:01,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 14:49:01,597 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) [2021-05-02 14:49:01,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:49:01,630 INFO L93 Difference]: Finished difference Result 70 states and 92 transitions. [2021-05-02 14:49:01,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 14:49:01,631 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 [2021-05-02 14:49:01,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:49:01,633 INFO L225 Difference]: With dead ends: 70 [2021-05-02 14:49:01,633 INFO L226 Difference]: Without dead ends: 68 [2021-05-02 14:49:01,634 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.5ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 14:49:01,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-02 14:49:01,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-05-02 14:49:01,656 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) [2021-05-02 14:49:01,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 90 transitions. [2021-05-02 14:49:01,657 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 90 transitions. Word has length 49 [2021-05-02 14:49:01,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:49:01,657 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 90 transitions. [2021-05-02 14:49:01,658 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) [2021-05-02 14:49:01,658 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 90 transitions. [2021-05-02 14:49:01,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-02 14:49:01,662 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:49:01,662 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] [2021-05-02 14:49:01,862 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:49:01,863 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:49:01,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:49:01,863 INFO L82 PathProgramCache]: Analyzing trace with hash -1107651435, now seen corresponding path program 1 times [2021-05-02 14:49:01,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:49:01,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998159609] [2021-05-02 14:49:01,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:49:01,872 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:49:01,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [40524115] [2021-05-02 14:49:01,872 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 [2021-05-02 14:49:01,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:49:01,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 14:49:01,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:49:01,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:02,021 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-05-02 14:49:02,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:49:02,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998159609] [2021-05-02 14:49:02,021 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:49:02,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40524115] [2021-05-02 14:49:02,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40524115] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:49:02,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:49:02,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 14:49:02,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547207619] [2021-05-02 14:49:02,022 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 14:49:02,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:49:02,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 14:49:02,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 14:49:02,023 INFO L87 Difference]: Start difference. First operand 68 states and 90 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-02 14:49:02,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:49:02,090 INFO L93 Difference]: Finished difference Result 84 states and 108 transitions. [2021-05-02 14:49:02,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 14:49:02,091 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 51 [2021-05-02 14:49:02,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:49:02,092 INFO L225 Difference]: With dead ends: 84 [2021-05-02 14:49:02,092 INFO L226 Difference]: Without dead ends: 82 [2021-05-02 14:49:02,092 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 28.7ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:49:02,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-05-02 14:49:02,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2021-05-02 14:49:02,099 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) [2021-05-02 14:49:02,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 102 transitions. [2021-05-02 14:49:02,100 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 102 transitions. Word has length 51 [2021-05-02 14:49:02,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:49:02,100 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 102 transitions. [2021-05-02 14:49:02,100 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-02 14:49:02,100 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 102 transitions. [2021-05-02 14:49:02,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-02 14:49:02,101 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:49:02,101 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] [2021-05-02 14:49:02,309 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 14:49:02,309 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:49:02,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:49:02,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1924168317, now seen corresponding path program 1 times [2021-05-02 14:49:02,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:49:02,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3362340] [2021-05-02 14:49:02,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:49:02,321 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:49:02,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [280544294] [2021-05-02 14:49:02,322 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 [2021-05-02 14:49:02,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:49:02,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 14:49:02,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:49:02,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:02,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:02,504 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-05-02 14:49:02,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:49:02,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3362340] [2021-05-02 14:49:02,504 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:49:02,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280544294] [2021-05-02 14:49:02,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280544294] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:49:02,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:49:02,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 14:49:02,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119366989] [2021-05-02 14:49:02,505 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 14:49:02,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:49:02,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 14:49:02,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:49:02,506 INFO L87 Difference]: Start difference. First operand 79 states and 102 transitions. Second operand has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 4 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) [2021-05-02 14:49:02,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:49:02,598 INFO L93 Difference]: Finished difference Result 88 states and 112 transitions. [2021-05-02 14:49:02,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 14:49:02,599 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 4 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 [2021-05-02 14:49:02,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:49:02,603 INFO L225 Difference]: With dead ends: 88 [2021-05-02 14:49:02,603 INFO L226 Difference]: Without dead ends: 84 [2021-05-02 14:49:02,603 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 41.9ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:49:02,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-05-02 14:49:02,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-05-02 14:49:02,618 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) [2021-05-02 14:49:02,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 105 transitions. [2021-05-02 14:49:02,619 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 105 transitions. Word has length 54 [2021-05-02 14:49:02,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:49:02,619 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 105 transitions. [2021-05-02 14:49:02,619 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 4 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) [2021-05-02 14:49:02,619 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 105 transitions. [2021-05-02 14:49:02,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-02 14:49:02,620 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:49:02,620 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] [2021-05-02 14:49:02,838 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:49:02,839 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:49:02,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:49:02,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1698149216, now seen corresponding path program 1 times [2021-05-02 14:49:02,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:49:02,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942323646] [2021-05-02 14:49:02,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:49:02,853 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:49:02,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1106774758] [2021-05-02 14:49:02,853 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 [2021-05-02 14:49:02,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:49:02,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-02 14:49:02,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:49:02,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:02,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:02,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:02,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:02,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:02,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:02,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:02,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:02,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:02,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:03,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:03,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:03,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:03,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:03,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:03,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:03,104 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 10 proven. 19 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-05-02 14:49:03,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:49:03,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942323646] [2021-05-02 14:49:03,104 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:49:03,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106774758] [2021-05-02 14:49:03,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106774758] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:49:03,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:49:03,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 14:49:03,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625321414] [2021-05-02 14:49:03,105 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 14:49:03,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:49:03,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 14:49:03,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-02 14:49:03,106 INFO L87 Difference]: Start difference. First operand 84 states and 105 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-02 14:49:03,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:49:03,303 INFO L93 Difference]: Finished difference Result 118 states and 147 transitions. [2021-05-02 14:49:03,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 14:49:03,304 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 56 [2021-05-02 14:49:03,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:49:03,305 INFO L225 Difference]: With dead ends: 118 [2021-05-02 14:49:03,305 INFO L226 Difference]: Without dead ends: 116 [2021-05-02 14:49:03,305 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 97.7ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-05-02 14:49:03,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-05-02 14:49:03,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 112. [2021-05-02 14:49:03,314 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) [2021-05-02 14:49:03,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 138 transitions. [2021-05-02 14:49:03,315 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 138 transitions. Word has length 56 [2021-05-02 14:49:03,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:49:03,315 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 138 transitions. [2021-05-02 14:49:03,315 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-02 14:49:03,315 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 138 transitions. [2021-05-02 14:49:03,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-02 14:49:03,315 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:49:03,316 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] [2021-05-02 14:49:03,529 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:49:03,529 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:49:03,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:49:03,529 INFO L82 PathProgramCache]: Analyzing trace with hash 888099957, now seen corresponding path program 2 times [2021-05-02 14:49:03,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:49:03,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826584886] [2021-05-02 14:49:03,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:49:03,536 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:49:03,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [251669600] [2021-05-02 14:49:03,537 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 [2021-05-02 14:49:03,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:49:03,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:49:03,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-02 14:49:03,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:49:03,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:03,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:03,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:03,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:03,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:03,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:03,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:03,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:03,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:03,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:03,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:03,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:03,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:03,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:03,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:03,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:03,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:03,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:03,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:03,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:03,731 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 13 proven. 13 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-02 14:49:03,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:49:03,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826584886] [2021-05-02 14:49:03,732 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:49:03,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251669600] [2021-05-02 14:49:03,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251669600] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:49:03,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:49:03,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 14:49:03,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688860229] [2021-05-02 14:49:03,732 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 14:49:03,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:49:03,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 14:49:03,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:49:03,733 INFO L87 Difference]: Start difference. First operand 112 states and 138 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-05-02 14:49:03,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:49:03,861 INFO L93 Difference]: Finished difference Result 137 states and 178 transitions. [2021-05-02 14:49:03,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 14:49:03,861 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 61 [2021-05-02 14:49:03,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:49:03,863 INFO L225 Difference]: With dead ends: 137 [2021-05-02 14:49:03,863 INFO L226 Difference]: Without dead ends: 131 [2021-05-02 14:49:03,864 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 53.5ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-02 14:49:03,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-05-02 14:49:03,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2021-05-02 14:49:03,877 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) [2021-05-02 14:49:03,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 167 transitions. [2021-05-02 14:49:03,878 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 167 transitions. Word has length 61 [2021-05-02 14:49:03,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:49:03,878 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 167 transitions. [2021-05-02 14:49:03,878 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-05-02 14:49:03,878 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 167 transitions. [2021-05-02 14:49:03,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-02 14:49:03,879 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:49:03,879 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] [2021-05-02 14:49:04,092 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-02 14:49:04,093 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:49:04,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:49:04,093 INFO L82 PathProgramCache]: Analyzing trace with hash 2064127436, now seen corresponding path program 1 times [2021-05-02 14:49:04,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:49:04,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681296015] [2021-05-02 14:49:04,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:49:04,100 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:49:04,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1861277049] [2021-05-02 14:49:04,100 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 [2021-05-02 14:49:04,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:49:04,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 14:49:04,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:49:04,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:04,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:04,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:04,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:04,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:04,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:04,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:04,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:04,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:04,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:04,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:04,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:04,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:04,321 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 18 proven. 13 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-05-02 14:49:04,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:49:04,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681296015] [2021-05-02 14:49:04,321 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:49:04,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861277049] [2021-05-02 14:49:04,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861277049] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:49:04,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:49:04,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 14:49:04,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909497299] [2021-05-02 14:49:04,323 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 14:49:04,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:49:04,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 14:49:04,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:49:04,324 INFO L87 Difference]: Start difference. First operand 131 states and 167 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 14:49:04,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:49:04,499 INFO L93 Difference]: Finished difference Result 151 states and 193 transitions. [2021-05-02 14:49:04,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 14:49:04,500 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 69 [2021-05-02 14:49:04,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:49:04,501 INFO L225 Difference]: With dead ends: 151 [2021-05-02 14:49:04,501 INFO L226 Difference]: Without dead ends: 149 [2021-05-02 14:49:04,501 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 88.6ms TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-02 14:49:04,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-05-02 14:49:04,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 147. [2021-05-02 14:49:04,511 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) [2021-05-02 14:49:04,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 188 transitions. [2021-05-02 14:49:04,512 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 188 transitions. Word has length 69 [2021-05-02 14:49:04,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:49:04,513 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 188 transitions. [2021-05-02 14:49:04,513 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 14:49:04,513 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 188 transitions. [2021-05-02 14:49:04,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-02 14:49:04,513 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:49:04,513 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] [2021-05-02 14:49:04,728 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:49:04,730 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:49:04,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:49:04,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1872855628, now seen corresponding path program 2 times [2021-05-02 14:49:04,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:49:04,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545456911] [2021-05-02 14:49:04,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:49:04,744 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:49:04,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1256356386] [2021-05-02 14:49:04,745 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 [2021-05-02 14:49:04,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:49:04,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:49:04,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 14:49:04,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:49:04,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:04,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:04,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:04,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:04,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:04,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:04,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:04,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:04,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:04,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:04,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:04,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:04,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:04,937 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 18 proven. 13 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-05-02 14:49:04,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:49:04,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545456911] [2021-05-02 14:49:04,937 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:49:04,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256356386] [2021-05-02 14:49:04,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256356386] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:49:04,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:49:04,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 14:49:04,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96186461] [2021-05-02 14:49:04,938 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 14:49:04,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:49:04,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 14:49:04,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:49:04,939 INFO L87 Difference]: Start difference. First operand 147 states and 188 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 14:49:05,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:49:05,104 INFO L93 Difference]: Finished difference Result 166 states and 212 transitions. [2021-05-02 14:49:05,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 14:49:05,104 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 69 [2021-05-02 14:49:05,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:49:05,105 INFO L225 Difference]: With dead ends: 166 [2021-05-02 14:49:05,105 INFO L226 Difference]: Without dead ends: 161 [2021-05-02 14:49:05,106 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 84.8ms TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-02 14:49:05,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-05-02 14:49:05,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 160. [2021-05-02 14:49:05,117 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) [2021-05-02 14:49:05,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 202 transitions. [2021-05-02 14:49:05,127 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 202 transitions. Word has length 69 [2021-05-02 14:49:05,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:49:05,128 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 202 transitions. [2021-05-02 14:49:05,128 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 14:49:05,128 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 202 transitions. [2021-05-02 14:49:05,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-02 14:49:05,132 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:49:05,132 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] [2021-05-02 14:49:05,344 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:49:05,347 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:49:05,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:49:05,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1196252297, now seen corresponding path program 2 times [2021-05-02 14:49:05,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:49:05,347 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060174000] [2021-05-02 14:49:05,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:49:05,353 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:49:05,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1809789506] [2021-05-02 14:49:05,353 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 [2021-05-02 14:49:05,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:49:05,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:49:05,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 46 conjunts are in the unsatisfiable core [2021-05-02 14:49:05,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:49:05,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:05,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:05,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:05,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:05,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:05,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:05,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:05,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:05,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:05,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:05,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:05,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:05,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:05,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:05,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:05,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:05,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:05,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:05,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:05,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:05,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:05,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:05,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:05,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:05,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:05,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:05,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:05,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:05,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:05,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:05,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:05,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:05,618 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 20 proven. 18 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-05-02 14:49:05,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:49:05,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060174000] [2021-05-02 14:49:05,618 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:49:05,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809789506] [2021-05-02 14:49:05,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809789506] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:49:05,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:49:05,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 14:49:05,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726416114] [2021-05-02 14:49:05,619 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 14:49:05,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:49:05,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 14:49:05,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:49:05,619 INFO L87 Difference]: Start difference. First operand 160 states and 202 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 14:49:05,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:49:05,793 INFO L93 Difference]: Finished difference Result 190 states and 241 transitions. [2021-05-02 14:49:05,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 14:49:05,794 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) Word has length 74 [2021-05-02 14:49:05,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:49:05,795 INFO L225 Difference]: With dead ends: 190 [2021-05-02 14:49:05,795 INFO L226 Difference]: Without dead ends: 188 [2021-05-02 14:49:05,795 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 76.3ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-02 14:49:05,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-05-02 14:49:05,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 184. [2021-05-02 14:49:05,807 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) [2021-05-02 14:49:05,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 232 transitions. [2021-05-02 14:49:05,808 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 232 transitions. Word has length 74 [2021-05-02 14:49:05,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:49:05,809 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 232 transitions. [2021-05-02 14:49:05,809 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 14:49:05,809 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 232 transitions. [2021-05-02 14:49:05,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-02 14:49:05,809 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:49:05,809 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] [2021-05-02 14:49:06,024 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-02 14:49:06,025 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:49:06,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:49:06,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1712511605, now seen corresponding path program 3 times [2021-05-02 14:49:06,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:49:06,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6088578] [2021-05-02 14:49:06,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:49:06,031 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:49:06,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [264903172] [2021-05-02 14:49:06,031 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 [2021-05-02 14:49:06,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 14:49:06,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:49:06,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-02 14:49:06,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:49:06,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:06,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:06,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:06,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:06,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:06,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:06,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:06,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:06,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:06,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:06,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:06,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:06,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:06,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:06,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:06,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:06,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:06,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:06,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:06,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:06,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:06,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:06,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:06,333 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 28 proven. 16 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-05-02 14:49:06,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:49:06,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6088578] [2021-05-02 14:49:06,334 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:49:06,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264903172] [2021-05-02 14:49:06,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264903172] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:49:06,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:49:06,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 14:49:06,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129517872] [2021-05-02 14:49:06,334 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 14:49:06,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:49:06,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 14:49:06,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:49:06,335 INFO L87 Difference]: Start difference. First operand 184 states and 232 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, (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) [2021-05-02 14:49:06,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:49:06,523 INFO L93 Difference]: Finished difference Result 213 states and 266 transitions. [2021-05-02 14:49:06,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 14:49:06,523 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, (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 [2021-05-02 14:49:06,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:49:06,524 INFO L225 Difference]: With dead ends: 213 [2021-05-02 14:49:06,524 INFO L226 Difference]: Without dead ends: 211 [2021-05-02 14:49:06,525 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 105.9ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-02 14:49:06,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-05-02 14:49:06,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 197. [2021-05-02 14:49:06,542 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) [2021-05-02 14:49:06,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 243 transitions. [2021-05-02 14:49:06,543 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 243 transitions. Word has length 74 [2021-05-02 14:49:06,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:49:06,544 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 243 transitions. [2021-05-02 14:49:06,544 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, (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) [2021-05-02 14:49:06,544 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 243 transitions. [2021-05-02 14:49:06,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-02 14:49:06,545 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:49:06,545 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] [2021-05-02 14:49:06,760 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-02 14:49:06,761 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:49:06,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:49:06,761 INFO L82 PathProgramCache]: Analyzing trace with hash 15858924, now seen corresponding path program 4 times [2021-05-02 14:49:06,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:49:06,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548557992] [2021-05-02 14:49:06,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:49:06,767 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:49:06,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1217502764] [2021-05-02 14:49:06,767 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 [2021-05-02 14:49:06,806 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 14:49:06,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:49:06,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 50 conjunts are in the unsatisfiable core [2021-05-02 14:49:06,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:49:06,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:06,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:06,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:06,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:06,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:06,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:06,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:06,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:06,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:06,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:06,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:06,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:06,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:06,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:06,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:06,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:06,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:06,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:06,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:06,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:07,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:07,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:07,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:07,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:07,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:07,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:07,099 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 53 proven. 22 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-05-02 14:49:07,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:49:07,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548557992] [2021-05-02 14:49:07,099 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:49:07,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217502764] [2021-05-02 14:49:07,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217502764] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:49:07,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:49:07,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 14:49:07,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986228207] [2021-05-02 14:49:07,100 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 14:49:07,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:49:07,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 14:49:07,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-05-02 14:49:07,100 INFO L87 Difference]: Start difference. First operand 197 states and 243 transitions. Second operand has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-02 14:49:07,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:49:07,414 INFO L93 Difference]: Finished difference Result 219 states and 272 transitions. [2021-05-02 14:49:07,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 14:49:07,414 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 5 states have call successors, (13) Word has length 79 [2021-05-02 14:49:07,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:49:07,416 INFO L225 Difference]: With dead ends: 219 [2021-05-02 14:49:07,416 INFO L226 Difference]: Without dead ends: 212 [2021-05-02 14:49:07,417 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 154.5ms TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-05-02 14:49:07,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-05-02 14:49:07,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 175. [2021-05-02 14:49:07,430 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) [2021-05-02 14:49:07,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 211 transitions. [2021-05-02 14:49:07,431 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 211 transitions. Word has length 79 [2021-05-02 14:49:07,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:49:07,431 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 211 transitions. [2021-05-02 14:49:07,431 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-02 14:49:07,431 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 211 transitions. [2021-05-02 14:49:07,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-02 14:49:07,431 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:49:07,432 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] [2021-05-02 14:49:07,646 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 14:49:07,647 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:49:07,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:49:07,647 INFO L82 PathProgramCache]: Analyzing trace with hash 2066842922, now seen corresponding path program 3 times [2021-05-02 14:49:07,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:49:07,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339817704] [2021-05-02 14:49:07,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:49:07,652 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:49:07,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [941237617] [2021-05-02 14:49:07,653 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 [2021-05-02 14:49:07,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 14:49:07,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:49:07,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-02 14:49:07,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:49:07,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:07,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:07,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:07,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:07,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:07,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:07,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:07,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:07,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:07,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:07,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:07,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:07,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:07,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:07,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:07,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:07,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:07,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:07,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:07,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:07,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:07,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:07,903 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 42 proven. 18 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-05-02 14:49:07,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:49:07,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339817704] [2021-05-02 14:49:07,903 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:49:07,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941237617] [2021-05-02 14:49:07,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941237617] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:49:07,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:49:07,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 14:49:07,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781072494] [2021-05-02 14:49:07,904 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 14:49:07,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:49:07,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 14:49:07,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-05-02 14:49:07,905 INFO L87 Difference]: Start difference. First operand 175 states and 211 transitions. Second operand has 13 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-02 14:49:08,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:49:08,196 INFO L93 Difference]: Finished difference Result 209 states and 258 transitions. [2021-05-02 14:49:08,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 14:49:08,196 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) Word has length 79 [2021-05-02 14:49:08,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:49:08,200 INFO L225 Difference]: With dead ends: 209 [2021-05-02 14:49:08,200 INFO L226 Difference]: Without dead ends: 202 [2021-05-02 14:49:08,201 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 90.4ms TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-05-02 14:49:08,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-05-02 14:49:08,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 199. [2021-05-02 14:49:08,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 118 states have (on average 1.152542372881356) internal successors, (136), 122 states have internal predecessors, (136), 54 states have call successors, (54), 27 states have call predecessors, (54), 26 states have return successors, (51), 49 states have call predecessors, (51), 51 states have call successors, (51) [2021-05-02 14:49:08,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 241 transitions. [2021-05-02 14:49:08,214 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 241 transitions. Word has length 79 [2021-05-02 14:49:08,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:49:08,215 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 241 transitions. [2021-05-02 14:49:08,215 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-02 14:49:08,215 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 241 transitions. [2021-05-02 14:49:08,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-02 14:49:08,215 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:49:08,215 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] [2021-05-02 14:49:08,428 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:49:08,429 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:49:08,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:49:08,429 INFO L82 PathProgramCache]: Analyzing trace with hash -105752765, now seen corresponding path program 5 times [2021-05-02 14:49:08,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:49:08,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309863636] [2021-05-02 14:49:08,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:49:08,434 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:49:08,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1210993235] [2021-05-02 14:49:08,434 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 [2021-05-02 14:49:08,499 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-02 14:49:08,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:49:08,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 14:49:08,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:49:08,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:08,640 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 20 proven. 28 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-05-02 14:49:08,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:49:08,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309863636] [2021-05-02 14:49:08,640 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:49:08,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210993235] [2021-05-02 14:49:08,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210993235] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:49:08,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:49:08,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 14:49:08,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305523030] [2021-05-02 14:49:08,641 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 14:49:08,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:49:08,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 14:49:08,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 14:49:08,641 INFO L87 Difference]: Start difference. First operand 199 states and 241 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-02 14:49:08,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:49:08,759 INFO L93 Difference]: Finished difference Result 231 states and 288 transitions. [2021-05-02 14:49:08,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 14:49:08,759 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 87 [2021-05-02 14:49:08,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:49:08,761 INFO L225 Difference]: With dead ends: 231 [2021-05-02 14:49:08,761 INFO L226 Difference]: Without dead ends: 229 [2021-05-02 14:49:08,761 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 39.1ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:49:08,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-05-02 14:49:08,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 216. [2021-05-02 14:49:08,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 125 states have (on average 1.16) internal successors, (145), 130 states have internal predecessors, (145), 63 states have call successors, (63), 28 states have call predecessors, (63), 27 states have return successors, (60), 57 states have call predecessors, (60), 60 states have call successors, (60) [2021-05-02 14:49:08,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 268 transitions. [2021-05-02 14:49:08,791 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 268 transitions. Word has length 87 [2021-05-02 14:49:08,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:49:08,792 INFO L480 AbstractCegarLoop]: Abstraction has 216 states and 268 transitions. [2021-05-02 14:49:08,792 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-02 14:49:08,792 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 268 transitions. [2021-05-02 14:49:08,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-02 14:49:08,793 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:49:08,793 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] [2021-05-02 14:49:09,009 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 14:49:09,009 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:49:09,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:49:09,009 INFO L82 PathProgramCache]: Analyzing trace with hash -297024573, now seen corresponding path program 6 times [2021-05-02 14:49:09,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:49:09,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704084844] [2021-05-02 14:49:09,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:49:09,017 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:49:09,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [402531996] [2021-05-02 14:49:09,017 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 [2021-05-02 14:49:09,068 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-02 14:49:09,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:49:09,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-02 14:49:09,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:49:09,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:09,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:09,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:09,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:09,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:09,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:09,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:09,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:09,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:09,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:09,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:09,283 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 27 proven. 24 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-05-02 14:49:09,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:49:09,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704084844] [2021-05-02 14:49:09,284 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:49:09,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402531996] [2021-05-02 14:49:09,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402531996] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:49:09,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:49:09,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 14:49:09,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667204142] [2021-05-02 14:49:09,286 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 14:49:09,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:49:09,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 14:49:09,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:49:09,287 INFO L87 Difference]: Start difference. First operand 216 states and 268 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-02 14:49:09,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:49:09,487 INFO L93 Difference]: Finished difference Result 241 states and 302 transitions. [2021-05-02 14:49:09,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 14:49:09,487 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) Word has length 87 [2021-05-02 14:49:09,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:49:09,488 INFO L225 Difference]: With dead ends: 241 [2021-05-02 14:49:09,488 INFO L226 Difference]: Without dead ends: 236 [2021-05-02 14:49:09,489 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 104.6ms TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-05-02 14:49:09,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-05-02 14:49:09,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 235. [2021-05-02 14:49:09,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 136 states have (on average 1.1544117647058822) internal successors, (157), 141 states have internal predecessors, (157), 69 states have call successors, (69), 30 states have call predecessors, (69), 29 states have return successors, (66), 63 states have call predecessors, (66), 66 states have call successors, (66) [2021-05-02 14:49:09,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 292 transitions. [2021-05-02 14:49:09,506 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 292 transitions. Word has length 87 [2021-05-02 14:49:09,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:49:09,506 INFO L480 AbstractCegarLoop]: Abstraction has 235 states and 292 transitions. [2021-05-02 14:49:09,506 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-02 14:49:09,506 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 292 transitions. [2021-05-02 14:49:09,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-02 14:49:09,506 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:49:09,507 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] [2021-05-02 14:49:09,720 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-02 14:49:09,721 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:49:09,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:49:09,721 INFO L82 PathProgramCache]: Analyzing trace with hash -239766271, now seen corresponding path program 7 times [2021-05-02 14:49:09,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:49:09,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383328473] [2021-05-02 14:49:09,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:49:09,726 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:49:09,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1209091717] [2021-05-02 14:49:09,726 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 [2021-05-02 14:49:09,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:49:09,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 14:49:09,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:49:09,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:09,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:09,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:09,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:09,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:09,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:09,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:09,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:09,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:09,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:09,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:09,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:09,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:09,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:09,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:09,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:09,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:09,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:09,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:09,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:09,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:09,981 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 24 proven. 27 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-05-02 14:49:09,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:49:09,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383328473] [2021-05-02 14:49:09,991 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:49:09,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209091717] [2021-05-02 14:49:09,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209091717] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:49:09,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:49:09,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 14:49:09,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379957899] [2021-05-02 14:49:09,993 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 14:49:09,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:49:09,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 14:49:09,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-05-02 14:49:09,993 INFO L87 Difference]: Start difference. First operand 235 states and 292 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-02 14:49:10,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:49:10,276 INFO L93 Difference]: Finished difference Result 251 states and 315 transitions. [2021-05-02 14:49:10,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 14:49:10,276 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 87 [2021-05-02 14:49:10,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:49:10,277 INFO L225 Difference]: With dead ends: 251 [2021-05-02 14:49:10,277 INFO L226 Difference]: Without dead ends: 249 [2021-05-02 14:49:10,278 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 160.3ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-05-02 14:49:10,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-05-02 14:49:10,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 247. [2021-05-02 14:49:10,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 141 states have (on average 1.1560283687943262) internal successors, (163), 147 states have internal predecessors, (163), 75 states have call successors, (75), 31 states have call predecessors, (75), 30 states have return successors, (72), 68 states have call predecessors, (72), 72 states have call successors, (72) [2021-05-02 14:49:10,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 310 transitions. [2021-05-02 14:49:10,295 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 310 transitions. Word has length 87 [2021-05-02 14:49:10,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:49:10,295 INFO L480 AbstractCegarLoop]: Abstraction has 247 states and 310 transitions. [2021-05-02 14:49:10,296 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-02 14:49:10,296 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 310 transitions. [2021-05-02 14:49:10,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-02 14:49:10,296 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:49:10,296 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] [2021-05-02 14:49:10,504 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-02 14:49:10,505 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:49:10,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:49:10,505 INFO L82 PathProgramCache]: Analyzing trace with hash 85135427, now seen corresponding path program 8 times [2021-05-02 14:49:10,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:49:10,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820088037] [2021-05-02 14:49:10,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:49:10,513 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:49:10,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2067662328] [2021-05-02 14:49:10,514 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 [2021-05-02 14:49:10,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:49:10,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:49:10,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 14:49:10,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:49:10,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:10,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:10,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:10,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:10,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:10,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:10,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:10,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:10,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:10,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:10,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:10,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:10,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:10,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:10,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:10,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:10,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:10,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:10,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:10,746 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 27 proven. 24 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-05-02 14:49:10,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:49:10,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820088037] [2021-05-02 14:49:10,746 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:49:10,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067662328] [2021-05-02 14:49:10,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067662328] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:49:10,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:49:10,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 14:49:10,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177430800] [2021-05-02 14:49:10,746 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 14:49:10,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:49:10,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 14:49:10,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-05-02 14:49:10,747 INFO L87 Difference]: Start difference. First operand 247 states and 310 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-02 14:49:11,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:49:11,020 INFO L93 Difference]: Finished difference Result 262 states and 331 transitions. [2021-05-02 14:49:11,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 14:49:11,020 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) Word has length 87 [2021-05-02 14:49:11,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:49:11,021 INFO L225 Difference]: With dead ends: 262 [2021-05-02 14:49:11,021 INFO L226 Difference]: Without dead ends: 257 [2021-05-02 14:49:11,022 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 131.4ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-05-02 14:49:11,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-05-02 14:49:11,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 247. [2021-05-02 14:49:11,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 141 states have (on average 1.1560283687943262) internal successors, (163), 147 states have internal predecessors, (163), 75 states have call successors, (75), 31 states have call predecessors, (75), 30 states have return successors, (72), 68 states have call predecessors, (72), 72 states have call successors, (72) [2021-05-02 14:49:11,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 310 transitions. [2021-05-02 14:49:11,040 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 310 transitions. Word has length 87 [2021-05-02 14:49:11,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:49:11,040 INFO L480 AbstractCegarLoop]: Abstraction has 247 states and 310 transitions. [2021-05-02 14:49:11,040 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-02 14:49:11,040 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 310 transitions. [2021-05-02 14:49:11,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-02 14:49:11,041 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:49:11,041 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] [2021-05-02 14:49:11,256 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:49:11,256 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:49:11,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:49:11,257 INFO L82 PathProgramCache]: Analyzing trace with hash 142393729, now seen corresponding path program 9 times [2021-05-02 14:49:11,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:49:11,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797577894] [2021-05-02 14:49:11,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:49:11,264 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:49:11,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1373750965] [2021-05-02 14:49:11,264 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 [2021-05-02 14:49:11,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 14:49:11,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:49:11,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-02 14:49:11,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:49:11,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:11,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:11,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:11,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:11,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:11,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:11,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:11,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:11,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:11,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:11,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:11,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:11,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:11,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:11,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:11,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:11,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:11,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:11,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:11,479 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 57 proven. 12 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2021-05-02 14:49:11,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:49:11,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797577894] [2021-05-02 14:49:11,479 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:49:11,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373750965] [2021-05-02 14:49:11,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373750965] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:49:11,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:49:11,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 14:49:11,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778304099] [2021-05-02 14:49:11,479 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 14:49:11,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:49:11,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 14:49:11,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-05-02 14:49:11,480 INFO L87 Difference]: Start difference. First operand 247 states and 310 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 10 states have internal predecessors, (28), 5 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 14:49:17,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:49:17,652 INFO L93 Difference]: Finished difference Result 253 states and 315 transitions. [2021-05-02 14:49:17,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 14:49:17,653 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 10 states have internal predecessors, (28), 5 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 87 [2021-05-02 14:49:17,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:49:17,654 INFO L225 Difference]: With dead ends: 253 [2021-05-02 14:49:17,654 INFO L226 Difference]: Without dead ends: 248 [2021-05-02 14:49:17,654 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 87.6ms TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-05-02 14:49:17,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-05-02 14:49:17,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 228. [2021-05-02 14:49:17,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 136 states have (on average 1.1323529411764706) internal successors, (154), 141 states have internal predecessors, (154), 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) [2021-05-02 14:49:17,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 274 transitions. [2021-05-02 14:49:17,673 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 274 transitions. Word has length 87 [2021-05-02 14:49:17,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:49:17,673 INFO L480 AbstractCegarLoop]: Abstraction has 228 states and 274 transitions. [2021-05-02 14:49:17,673 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 10 states have internal predecessors, (28), 5 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 14:49:17,674 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 274 transitions. [2021-05-02 14:49:17,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-02 14:49:17,674 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:49:17,674 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] [2021-05-02 14:49:17,876 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:49:17,877 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:49:17,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:49:17,877 INFO L82 PathProgramCache]: Analyzing trace with hash -48878079, now seen corresponding path program 10 times [2021-05-02 14:49:17,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:49:17,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904457378] [2021-05-02 14:49:17,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:49:17,882 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:49:17,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [632788435] [2021-05-02 14:49:17,882 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:49:17,925 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 14:49:17,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:49:17,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-02 14:49:17,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:49:17,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:17,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:17,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:17,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:18,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:18,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:18,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:18,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:18,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:18,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:18,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:18,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:18,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:18,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:18,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:18,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:18,150 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 24 proven. 27 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-05-02 14:49:18,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:49:18,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904457378] [2021-05-02 14:49:18,150 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:49:18,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632788435] [2021-05-02 14:49:18,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632788435] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:49:18,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:49:18,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 14:49:18,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486962955] [2021-05-02 14:49:18,151 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 14:49:18,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:49:18,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 14:49:18,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-05-02 14:49:18,151 INFO L87 Difference]: Start difference. First operand 228 states and 274 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-02 14:49:18,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:49:18,402 INFO L93 Difference]: Finished difference Result 240 states and 289 transitions. [2021-05-02 14:49:18,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 14:49:18,402 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 87 [2021-05-02 14:49:18,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:49:18,403 INFO L225 Difference]: With dead ends: 240 [2021-05-02 14:49:18,403 INFO L226 Difference]: Without dead ends: 238 [2021-05-02 14:49:18,403 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 174.7ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-05-02 14:49:18,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-05-02 14:49:18,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 234. [2021-05-02 14:49:18,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 140 states have (on average 1.1285714285714286) internal successors, (158), 146 states have internal predecessors, (158), 62 states have call successors, (62), 32 states have call predecessors, (62), 31 states have return successors, (60), 55 states have call predecessors, (60), 60 states have call successors, (60) [2021-05-02 14:49:18,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 280 transitions. [2021-05-02 14:49:18,421 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 280 transitions. Word has length 87 [2021-05-02 14:49:18,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:49:18,422 INFO L480 AbstractCegarLoop]: Abstraction has 234 states and 280 transitions. [2021-05-02 14:49:18,422 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-02 14:49:18,423 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 280 transitions. [2021-05-02 14:49:18,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-02 14:49:18,423 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:49:18,423 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] [2021-05-02 14:49:18,628 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-02 14:49:18,629 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:49:18,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:49:18,629 INFO L82 PathProgramCache]: Analyzing trace with hash 418671986, now seen corresponding path program 3 times [2021-05-02 14:49:18,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:49:18,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498534705] [2021-05-02 14:49:18,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:49:18,633 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:49:18,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1536326851] [2021-05-02 14:49:18,634 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 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 [2021-05-02 14:49:18,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 14:49:18,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:49:18,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-02 14:49:18,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:49:18,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:18,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:18,867 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 82 proven. 18 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2021-05-02 14:49:18,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:49:18,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498534705] [2021-05-02 14:49:18,867 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:49:18,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536326851] [2021-05-02 14:49:18,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536326851] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:49:18,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:49:18,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 14:49:18,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391585024] [2021-05-02 14:49:18,868 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 14:49:18,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:49:18,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 14:49:18,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:49:18,868 INFO L87 Difference]: Start difference. First operand 234 states and 280 transitions. Second operand has 11 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 6 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 14:49:23,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:49:23,056 INFO L93 Difference]: Finished difference Result 268 states and 323 transitions. [2021-05-02 14:49:23,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 14:49:23,056 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 6 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 92 [2021-05-02 14:49:23,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:49:23,057 INFO L225 Difference]: With dead ends: 268 [2021-05-02 14:49:23,057 INFO L226 Difference]: Without dead ends: 266 [2021-05-02 14:49:23,058 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 90.4ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-05-02 14:49:23,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-05-02 14:49:23,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 252. [2021-05-02 14:49:23,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 152 states have (on average 1.131578947368421) internal successors, (172), 158 states have internal predecessors, (172), 65 states have call successors, (65), 35 states have call predecessors, (65), 34 states have return successors, (63), 58 states have call predecessors, (63), 63 states have call successors, (63) [2021-05-02 14:49:23,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 300 transitions. [2021-05-02 14:49:23,076 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 300 transitions. Word has length 92 [2021-05-02 14:49:23,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:49:23,076 INFO L480 AbstractCegarLoop]: Abstraction has 252 states and 300 transitions. [2021-05-02 14:49:23,076 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 6 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 14:49:23,076 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 300 transitions. [2021-05-02 14:49:23,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-02 14:49:23,076 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:49:23,077 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] [2021-05-02 14:49:23,284 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-02 14:49:23,284 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:49:23,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:49:23,284 INFO L82 PathProgramCache]: Analyzing trace with hash 1804875380, now seen corresponding path program 11 times [2021-05-02 14:49:23,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:49:23,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291848514] [2021-05-02 14:49:23,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:49:23,289 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:49:23,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [824020378] [2021-05-02 14:49:23,289 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 [2021-05-02 14:49:23,383 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-02 14:49:23,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:49:23,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 46 conjunts are in the unsatisfiable core [2021-05-02 14:49:23,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:49:23,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:23,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:23,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:23,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:23,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:23,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:23,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:23,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:23,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:23,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:23,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:23,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:23,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:23,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:23,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:23,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:23,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:23,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:23,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:23,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:23,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:23,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:23,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:23,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:23,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:23,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:23,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:23,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:23,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:23,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:23,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:23,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:23,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:23,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:23,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:23,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:23,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:23,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:23,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:23,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:23,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:23,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:23,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:23,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:23,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:27,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:27,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:27,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:27,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:27,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:27,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:27,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:27,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:27,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:27,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:27,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:27,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:27,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:27,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:27,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:27,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:27,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:27,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:27,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:27,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:27,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:27,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:27,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:27,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:27,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:27,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:27,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:27,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:27,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:27,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:27,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:27,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:27,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:27,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:27,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:27,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:27,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:27,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:27,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:27,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:49:27,451 WARN L159 QuantifierPusher]: Ignoring assumption.