/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/prod4br-ll_unwindbound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 16:15:45,975 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 16:15:45,977 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 16:15:46,006 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 16:15:46,023 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 16:15:46,025 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 16:15:46,027 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 16:15:46,028 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 16:15:46,030 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 16:15:46,031 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 16:15:46,032 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 16:15:46,036 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 16:15:46,037 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 16:15:46,038 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 16:15:46,039 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 16:15:46,040 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 16:15:46,045 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 16:15:46,060 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 16:15:46,061 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 16:15:46,061 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 16:15:46,062 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 16:15:46,091 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 16:15:46,091 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 16:15:46,093 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 16:15:46,093 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 16:15:46,093 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 16:15:46,094 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 16:15:46,094 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 16:15:46,094 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 16:15:46,094 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 16:15:46,094 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 16:15:46,095 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 16:15:46,095 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 16:15:46,095 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 16:15:46,095 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 16:15:46,095 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 16:15:46,095 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 16:15:46,095 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 16:15:46,096 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 16:15:46,096 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 16:15:46,096 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 16:15:46,096 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 16:15:46,096 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 16:15:46,096 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 16:15:46,096 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 16:15:46,096 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 16:15:46,096 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 16:15:46,097 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 16:15:46,097 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 16:15:46,097 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 16:15:46,337 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 16:15:46,354 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 16:15:46,361 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 16:15:46,362 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 16:15:46,362 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 16:15:46,363 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_unwindbound20.c [2021-05-02 16:15:46,414 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6bbd0c658/d15f8b85151f498bb1aba23c2824599e/FLAG56f36f737 [2021-05-02 16:15:46,785 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 16:15:46,786 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_unwindbound20.c [2021-05-02 16:15:46,791 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6bbd0c658/d15f8b85151f498bb1aba23c2824599e/FLAG56f36f737 [2021-05-02 16:15:46,807 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6bbd0c658/d15f8b85151f498bb1aba23c2824599e [2021-05-02 16:15:46,809 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 16:15:46,811 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 16:15:46,814 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 16:15:46,814 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 16:15:46,817 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 16:15:46,818 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 04:15:46" (1/1) ... [2021-05-02 16:15:46,818 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58320f9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:15:46, skipping insertion in model container [2021-05-02 16:15:46,818 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 04:15:46" (1/1) ... [2021-05-02 16:15:46,823 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 16:15:46,839 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 16:15:46,954 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/prod4br-ll_unwindbound20.c[524,537] [2021-05-02 16:15:46,978 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 16:15:46,983 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 16:15:46,993 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/prod4br-ll_unwindbound20.c[524,537] [2021-05-02 16:15:47,011 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 16:15:47,042 INFO L208 MainTranslator]: Completed translation [2021-05-02 16:15:47,042 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:15:47 WrapperNode [2021-05-02 16:15:47,042 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 16:15:47,044 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 16:15:47,044 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 16:15:47,045 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 16:15:47,054 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:15:47" (1/1) ... [2021-05-02 16:15:47,055 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:15:47" (1/1) ... [2021-05-02 16:15:47,070 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:15:47" (1/1) ... [2021-05-02 16:15:47,071 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:15:47" (1/1) ... [2021-05-02 16:15:47,080 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:15:47" (1/1) ... [2021-05-02 16:15:47,086 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:15:47" (1/1) ... [2021-05-02 16:15:47,089 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:15:47" (1/1) ... [2021-05-02 16:15:47,090 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 16:15:47,091 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 16:15:47,091 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 16:15:47,091 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 16:15:47,092 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:15:47" (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 16:15:47,148 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 16:15:47,148 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 16:15:47,149 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 16:15:47,149 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 16:15:47,149 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 16:15:47,149 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 16:15:47,149 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 16:15:47,149 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 16:15:47,149 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 16:15:47,150 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 16:15:47,150 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 16:15:47,150 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 16:15:47,150 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 16:15:47,150 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 16:15:47,151 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 16:15:47,151 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 16:15:47,151 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 16:15:47,151 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 16:15:47,151 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 16:15:47,151 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 16:15:47,390 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 16:15:47,390 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 16:15:47,391 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 04:15:47 BoogieIcfgContainer [2021-05-02 16:15:47,391 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 16:15:47,392 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 16:15:47,392 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 16:15:47,394 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 16:15:47,394 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 04:15:46" (1/3) ... [2021-05-02 16:15:47,395 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@565f5746 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 04:15:47, skipping insertion in model container [2021-05-02 16:15:47,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:15:47" (2/3) ... [2021-05-02 16:15:47,395 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@565f5746 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 04:15:47, skipping insertion in model container [2021-05-02 16:15:47,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 04:15:47" (3/3) ... [2021-05-02 16:15:47,396 INFO L111 eAbstractionObserver]: Analyzing ICFG prod4br-ll_unwindbound20.c [2021-05-02 16:15:47,399 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 16:15:47,401 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 16:15:47,428 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 16:15:47,443 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 16:15:47,443 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 16:15:47,443 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 16:15:47,443 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 16:15:47,443 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 16:15:47,443 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 16:15:47,443 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 16:15:47,443 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 16:15:47,474 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 16:15:47,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 16:15:47,477 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:15:47,477 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:15:47,478 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:15:47,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:15:47,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1717894843, now seen corresponding path program 1 times [2021-05-02 16:15:47,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:15:47,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816653610] [2021-05-02 16:15:47,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:15:47,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:15:47,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 16:15:47,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:15:47,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 16:15:47,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:15:47,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:15:47,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:15:47,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816653610] [2021-05-02 16:15:47,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816653610] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 16:15:47,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 16:15:47,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 16:15:47,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064259384] [2021-05-02 16:15:47,709 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 16:15:47,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:15:47,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 16:15:47,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 16:15:47,718 INFO L87 Difference]: Start difference. First operand has 32 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 16:15:47,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:15:47,806 INFO L93 Difference]: Finished difference Result 56 states and 77 transitions. [2021-05-02 16:15:47,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 16:15:47,807 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-02 16:15:47,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:15:47,812 INFO L225 Difference]: With dead ends: 56 [2021-05-02 16:15:47,812 INFO L226 Difference]: Without dead ends: 28 [2021-05-02 16:15:47,814 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 16:15:47,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-05-02 16:15:47,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2021-05-02 16:15:47,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 16:15:47,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2021-05-02 16:15:47,845 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 17 [2021-05-02 16:15:47,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:15:47,845 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2021-05-02 16:15:47,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 16:15:47,845 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2021-05-02 16:15:47,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 16:15:47,846 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:15:47,846 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:15:47,847 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 16:15:47,847 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:15:47,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:15:47,847 INFO L82 PathProgramCache]: Analyzing trace with hash 444281082, now seen corresponding path program 1 times [2021-05-02 16:15:47,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:15:47,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710731889] [2021-05-02 16:15:47,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:15:47,862 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:15:47,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [874089832] [2021-05-02 16:15:47,862 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 16:15:47,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:15:47,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 16:15:47,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:15:47,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:47,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:47,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:48,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:48,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:48,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:15:48,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:15:48,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710731889] [2021-05-02 16:15:48,022 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:15:48,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874089832] [2021-05-02 16:15:48,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874089832] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 16:15:48,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 16:15:48,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 16:15:48,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847705107] [2021-05-02 16:15:48,024 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 16:15:48,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:15:48,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 16:15:48,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 16:15:48,026 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 16:15:48,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:15:48,038 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2021-05-02 16:15:48,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 16:15:48,039 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2021-05-02 16:15:48,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:15:48,039 INFO L225 Difference]: With dead ends: 37 [2021-05-02 16:15:48,040 INFO L226 Difference]: Without dead ends: 29 [2021-05-02 16:15:48,040 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 16:15:48,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-02 16:15:48,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-05-02 16:15:48,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 16:15:48,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2021-05-02 16:15:48,044 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 18 [2021-05-02 16:15:48,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:15:48,044 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2021-05-02 16:15:48,045 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 16:15:48,045 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2021-05-02 16:15:48,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 16:15:48,045 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:15:48,045 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:15:48,262 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 16:15:48,262 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:15:48,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:15:48,263 INFO L82 PathProgramCache]: Analyzing trace with hash 446068542, now seen corresponding path program 1 times [2021-05-02 16:15:48,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:15:48,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043218652] [2021-05-02 16:15:48,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:15:48,272 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:15:48,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1859210998] [2021-05-02 16:15:48,273 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 16:15:48,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:15:48,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 16:15:48,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:15:48,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:48,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:48,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:15:48,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:15:48,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043218652] [2021-05-02 16:15:48,391 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:15:48,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859210998] [2021-05-02 16:15:48,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859210998] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 16:15:48,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 16:15:48,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 16:15:48,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127356649] [2021-05-02 16:15:48,391 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 16:15:48,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:15:48,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 16:15:48,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 16:15:48,392 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 8 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 16:15:48,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:15:48,486 INFO L93 Difference]: Finished difference Result 42 states and 53 transitions. [2021-05-02 16:15:48,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 16:15:48,486 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-02 16:15:48,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:15:48,487 INFO L225 Difference]: With dead ends: 42 [2021-05-02 16:15:48,487 INFO L226 Difference]: Without dead ends: 40 [2021-05-02 16:15:48,487 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 37.8ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 16:15:48,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-02 16:15:48,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2021-05-02 16:15:48,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 24 states have internal predecessors, (28), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 16:15:48,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2021-05-02 16:15:48,493 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 18 [2021-05-02 16:15:48,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:15:48,493 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2021-05-02 16:15:48,493 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 16:15:48,494 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2021-05-02 16:15:48,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-02 16:15:48,494 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:15:48,494 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:15:48,709 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:15:48,710 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:15:48,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:15:48,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1308579644, now seen corresponding path program 1 times [2021-05-02 16:15:48,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:15:48,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921330676] [2021-05-02 16:15:48,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:15:48,735 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:15:48,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2091705747] [2021-05-02 16:15:48,736 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 16:15:48,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:15:48,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 16:15:48,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:15:48,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:48,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:48,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:48,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:48,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:48,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:48,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:48,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:48,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:48,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:48,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:48,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:48,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:49,006 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:15:49,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:15:49,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921330676] [2021-05-02 16:15:49,006 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:15:49,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091705747] [2021-05-02 16:15:49,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091705747] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:15:49,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:15:49,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 16:15:49,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489463427] [2021-05-02 16:15:49,007 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 16:15:49,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:15:49,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 16:15:49,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-05-02 16:15:49,007 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 9 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 16:15:49,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:15:49,267 INFO L93 Difference]: Finished difference Result 51 states and 64 transitions. [2021-05-02 16:15:49,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 16:15:49,267 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 9 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2021-05-02 16:15:49,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:15:49,269 INFO L225 Difference]: With dead ends: 51 [2021-05-02 16:15:49,269 INFO L226 Difference]: Without dead ends: 43 [2021-05-02 16:15:49,269 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 184.9ms TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-05-02 16:15:49,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-02 16:15:49,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2021-05-02 16:15:49,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 29 states have internal predecessors, (36), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 16:15:49,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2021-05-02 16:15:49,276 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 24 [2021-05-02 16:15:49,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:15:49,277 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2021-05-02 16:15:49,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 9 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 16:15:49,277 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2021-05-02 16:15:49,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-02 16:15:49,277 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:15:49,277 INFO L523 BasicCegarLoop]: trace histogram [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 16:15:49,492 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:15:49,493 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:15:49,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:15:49,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1797927234, now seen corresponding path program 1 times [2021-05-02 16:15:49,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:15:49,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749035022] [2021-05-02 16:15:49,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:15:49,507 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:15:49,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [869654055] [2021-05-02 16:15:49,507 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 16:15:49,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:15:49,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 16:15:49,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:15:49,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:49,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:49,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:49,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:49,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:49,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:49,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:49,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:49,621 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:15:49,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:15:49,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749035022] [2021-05-02 16:15:49,621 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:15:49,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869654055] [2021-05-02 16:15:49,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869654055] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:15:49,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:15:49,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 16:15:49,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361909162] [2021-05-02 16:15:49,622 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 16:15:49,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:15:49,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 16:15:49,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 16:15:49,622 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 16:15:49,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:15:49,654 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2021-05-02 16:15:49,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 16:15:49,655 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 27 [2021-05-02 16:15:49,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:15:49,656 INFO L225 Difference]: With dead ends: 56 [2021-05-02 16:15:49,656 INFO L226 Difference]: Without dead ends: 48 [2021-05-02 16:15:49,657 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 11.8ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 16:15:49,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-02 16:15:49,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-05-02 16:15:49,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 36 states have internal predecessors, (47), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 16:15:49,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 61 transitions. [2021-05-02 16:15:49,670 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 61 transitions. Word has length 27 [2021-05-02 16:15:49,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:15:49,671 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 61 transitions. [2021-05-02 16:15:49,671 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 16:15:49,671 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 61 transitions. [2021-05-02 16:15:49,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-02 16:15:49,672 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:15:49,672 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:15:49,884 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:15:49,885 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:15:49,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:15:49,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1799714694, now seen corresponding path program 1 times [2021-05-02 16:15:49,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:15:49,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523472297] [2021-05-02 16:15:49,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:15:49,893 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:15:49,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2005588568] [2021-05-02 16:15:49,893 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 16:15:49,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:15:49,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 16:15:49,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:15:49,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:49,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:50,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:50,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:50,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:50,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:50,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:50,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:50,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:50,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:50,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:50,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:50,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:50,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:50,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:50,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:50,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:50,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:50,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:50,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:50,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:50,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:50,201 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:15:50,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:15:50,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523472297] [2021-05-02 16:15:50,201 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:15:50,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005588568] [2021-05-02 16:15:50,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005588568] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:15:50,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:15:50,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 16:15:50,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671198577] [2021-05-02 16:15:50,202 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 16:15:50,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:15:50,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 16:15:50,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 16:15:50,203 INFO L87 Difference]: Start difference. First operand 48 states and 61 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 16:15:54,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:15:54,597 INFO L93 Difference]: Finished difference Result 63 states and 81 transitions. [2021-05-02 16:15:54,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 16:15:54,597 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2021-05-02 16:15:54,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:15:54,598 INFO L225 Difference]: With dead ends: 63 [2021-05-02 16:15:54,598 INFO L226 Difference]: Without dead ends: 61 [2021-05-02 16:15:54,598 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 76.6ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-02 16:15:54,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-05-02 16:15:54,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 55. [2021-05-02 16:15:54,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 40 states have (on average 1.3) internal successors, (52), 42 states have internal predecessors, (52), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 16:15:54,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2021-05-02 16:15:54,603 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 27 [2021-05-02 16:15:54,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:15:54,604 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2021-05-02 16:15:54,604 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 16:15:54,604 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2021-05-02 16:15:54,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 16:15:54,604 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:15:54,604 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:15:54,819 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:15:54,820 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:15:54,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:15:54,820 INFO L82 PathProgramCache]: Analyzing trace with hash -1357155568, now seen corresponding path program 1 times [2021-05-02 16:15:54,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:15:54,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044814308] [2021-05-02 16:15:54,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:15:54,834 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:15:54,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1160153161] [2021-05-02 16:15:54,834 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 16:15:54,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:15:54,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 16:15:54,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:15:54,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:54,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:55,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:55,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:55,063 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:15:55,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:15:55,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044814308] [2021-05-02 16:15:55,063 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:15:55,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160153161] [2021-05-02 16:15:55,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160153161] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:15:55,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:15:55,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 16:15:55,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521780587] [2021-05-02 16:15:55,069 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 16:15:55,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:15:55,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 16:15:55,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 16:15:55,069 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 16:15:59,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:15:59,516 INFO L93 Difference]: Finished difference Result 79 states and 102 transitions. [2021-05-02 16:15:59,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 16:15:59,516 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2021-05-02 16:15:59,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:15:59,517 INFO L225 Difference]: With dead ends: 79 [2021-05-02 16:15:59,517 INFO L226 Difference]: Without dead ends: 64 [2021-05-02 16:15:59,517 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 125.7ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-02 16:15:59,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-02 16:15:59,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-05-02 16:15:59,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 47 states have (on average 1.297872340425532) internal successors, (61), 49 states have internal predecessors, (61), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 16:15:59,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 79 transitions. [2021-05-02 16:15:59,523 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 79 transitions. Word has length 28 [2021-05-02 16:15:59,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:15:59,523 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 79 transitions. [2021-05-02 16:15:59,523 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 16:15:59,523 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 79 transitions. [2021-05-02 16:15:59,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 16:15:59,523 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:15:59,523 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:15:59,732 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:15:59,733 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:15:59,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:15:59,733 INFO L82 PathProgramCache]: Analyzing trace with hash -293334773, now seen corresponding path program 1 times [2021-05-02 16:15:59,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:15:59,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398540519] [2021-05-02 16:15:59,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:15:59,747 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:15:59,747 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1930244535] [2021-05-02 16:15:59,747 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 16:15:59,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:15:59,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-02 16:15:59,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:15:59,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:59,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:59,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:59,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:59,949 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:15:59,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:15:59,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398540519] [2021-05-02 16:15:59,949 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:15:59,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930244535] [2021-05-02 16:15:59,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930244535] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:15:59,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:15:59,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 16:15:59,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223521900] [2021-05-02 16:15:59,950 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 16:15:59,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:15:59,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 16:15:59,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 16:15:59,951 INFO L87 Difference]: Start difference. First operand 64 states and 79 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 9 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 16:16:04,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:16:04,427 INFO L93 Difference]: Finished difference Result 92 states and 119 transitions. [2021-05-02 16:16:04,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 16:16:04,427 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 9 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2021-05-02 16:16:04,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:16:04,428 INFO L225 Difference]: With dead ends: 92 [2021-05-02 16:16:04,428 INFO L226 Difference]: Without dead ends: 77 [2021-05-02 16:16:04,428 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 116.0ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-02 16:16:04,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-05-02 16:16:04,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 74. [2021-05-02 16:16:04,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 55 states have (on average 1.290909090909091) internal successors, (71), 57 states have internal predecessors, (71), 11 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 16:16:04,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 91 transitions. [2021-05-02 16:16:04,434 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 91 transitions. Word has length 29 [2021-05-02 16:16:04,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:16:04,434 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 91 transitions. [2021-05-02 16:16:04,434 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 9 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 16:16:04,434 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 91 transitions. [2021-05-02 16:16:04,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 16:16:04,435 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:16:04,435 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:16:04,649 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:16:04,649 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:16:04,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:16:04,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1481672589, now seen corresponding path program 1 times [2021-05-02 16:16:04,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:16:04,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232336634] [2021-05-02 16:16:04,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:16:04,661 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:16:04,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [866716094] [2021-05-02 16:16:04,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:16:04,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:16:04,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-02 16:16:04,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:16:04,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:04,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:04,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:04,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:04,811 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:16:04,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:16:04,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232336634] [2021-05-02 16:16:04,812 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:16:04,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866716094] [2021-05-02 16:16:04,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866716094] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:16:04,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:16:04,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 16:16:04,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558125976] [2021-05-02 16:16:04,812 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 16:16:04,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:16:04,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 16:16:04,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 16:16:04,813 INFO L87 Difference]: Start difference. First operand 74 states and 91 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 16:16:04,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:16:04,966 INFO L93 Difference]: Finished difference Result 87 states and 109 transitions. [2021-05-02 16:16:04,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 16:16:04,967 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2021-05-02 16:16:04,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:16:04,967 INFO L225 Difference]: With dead ends: 87 [2021-05-02 16:16:04,967 INFO L226 Difference]: Without dead ends: 85 [2021-05-02 16:16:04,968 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 65.5ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-02 16:16:04,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-05-02 16:16:04,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 72. [2021-05-02 16:16:04,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 53 states have (on average 1.3018867924528301) internal successors, (69), 55 states have internal predecessors, (69), 11 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 16:16:04,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 89 transitions. [2021-05-02 16:16:04,984 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 89 transitions. Word has length 29 [2021-05-02 16:16:04,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:16:04,985 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 89 transitions. [2021-05-02 16:16:04,985 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 16:16:04,986 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 89 transitions. [2021-05-02 16:16:04,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 16:16:04,988 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:16:04,988 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:16:05,207 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-02 16:16:05,207 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:16:05,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:16:05,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1680888588, now seen corresponding path program 1 times [2021-05-02 16:16:05,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:16:05,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458159566] [2021-05-02 16:16:05,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:16:05,217 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:16:05,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [963464319] [2021-05-02 16:16:05,217 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 16:16:05,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:16:05,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-02 16:16:05,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:16:05,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:05,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:05,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:05,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:05,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:05,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:05,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:05,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:05,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:05,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:05,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:05,372 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 16:16:05,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:16:05,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458159566] [2021-05-02 16:16:05,372 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:16:05,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963464319] [2021-05-02 16:16:05,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963464319] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 16:16:05,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 16:16:05,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-02 16:16:05,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166313648] [2021-05-02 16:16:05,373 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 16:16:05,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:16:05,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 16:16:05,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-02 16:16:05,373 INFO L87 Difference]: Start difference. First operand 72 states and 89 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 16:16:05,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:16:05,470 INFO L93 Difference]: Finished difference Result 98 states and 127 transitions. [2021-05-02 16:16:05,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 16:16:05,470 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), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 33 [2021-05-02 16:16:05,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:16:05,471 INFO L225 Difference]: With dead ends: 98 [2021-05-02 16:16:05,471 INFO L226 Difference]: Without dead ends: 90 [2021-05-02 16:16:05,472 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 48.7ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-02 16:16:05,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-05-02 16:16:05,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 85. [2021-05-02 16:16:05,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 63 states have (on average 1.3333333333333333) internal successors, (84), 66 states have internal predecessors, (84), 14 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (12), 10 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 16:16:05,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 110 transitions. [2021-05-02 16:16:05,509 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 110 transitions. Word has length 33 [2021-05-02 16:16:05,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:16:05,509 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 110 transitions. [2021-05-02 16:16:05,509 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), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 16:16:05,509 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 110 transitions. [2021-05-02 16:16:05,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-02 16:16:05,512 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:16:05,512 INFO L523 BasicCegarLoop]: trace histogram [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 16:16:05,720 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:16:05,721 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:16:05,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:16:05,721 INFO L82 PathProgramCache]: Analyzing trace with hash 368374993, now seen corresponding path program 1 times [2021-05-02 16:16:05,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:16:05,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210039819] [2021-05-02 16:16:05,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:16:05,726 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:16:05,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2060612366] [2021-05-02 16:16:05,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:16:05,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:16:05,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 16:16:05,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:16:05,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:05,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:05,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:05,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:05,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:05,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:05,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:05,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:05,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:06,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:06,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:06,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:06,051 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 16:16:06,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:16:06,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210039819] [2021-05-02 16:16:06,051 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:16:06,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060612366] [2021-05-02 16:16:06,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060612366] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:16:06,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:16:06,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 16:16:06,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893167311] [2021-05-02 16:16:06,052 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 16:16:06,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:16:06,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 16:16:06,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-02 16:16:06,052 INFO L87 Difference]: Start difference. First operand 85 states and 110 transitions. Second operand has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 16:16:08,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:16:08,436 INFO L93 Difference]: Finished difference Result 103 states and 137 transitions. [2021-05-02 16:16:08,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 16:16:08,437 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 35 [2021-05-02 16:16:08,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:16:08,438 INFO L225 Difference]: With dead ends: 103 [2021-05-02 16:16:08,438 INFO L226 Difference]: Without dead ends: 101 [2021-05-02 16:16:08,438 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 223.2ms TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-05-02 16:16:08,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-05-02 16:16:08,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 94. [2021-05-02 16:16:08,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 69 states have (on average 1.3333333333333333) internal successors, (92), 73 states have internal predecessors, (92), 16 states have call successors, (16), 9 states have call predecessors, (16), 8 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 16:16:08,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 122 transitions. [2021-05-02 16:16:08,449 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 122 transitions. Word has length 35 [2021-05-02 16:16:08,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:16:08,450 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 122 transitions. [2021-05-02 16:16:08,450 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 16:16:08,450 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 122 transitions. [2021-05-02 16:16:08,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-02 16:16:08,450 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:16:08,450 INFO L523 BasicCegarLoop]: trace histogram [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 16:16:08,662 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-02 16:16:08,663 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:16:08,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:16:08,663 INFO L82 PathProgramCache]: Analyzing trace with hash -218431021, now seen corresponding path program 1 times [2021-05-02 16:16:08,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:16:08,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587586089] [2021-05-02 16:16:08,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:16:08,669 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:16:08,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [968677459] [2021-05-02 16:16:08,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:16:08,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:16:08,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 16:16:08,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:16:08,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:08,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:08,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:08,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:08,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:08,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:08,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:08,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:08,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:08,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:08,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:08,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:08,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:08,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:08,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:08,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:08,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:09,012 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 16:16:09,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:16:09,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587586089] [2021-05-02 16:16:09,013 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:16:09,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968677459] [2021-05-02 16:16:09,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968677459] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:16:09,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:16:09,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 16:16:09,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782950850] [2021-05-02 16:16:09,013 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 16:16:09,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:16:09,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 16:16:09,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-05-02 16:16:09,014 INFO L87 Difference]: Start difference. First operand 94 states and 122 transitions. Second operand has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 16:16:09,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:16:09,522 INFO L93 Difference]: Finished difference Result 123 states and 163 transitions. [2021-05-02 16:16:09,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 16:16:09,523 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 35 [2021-05-02 16:16:09,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:16:09,524 INFO L225 Difference]: With dead ends: 123 [2021-05-02 16:16:09,524 INFO L226 Difference]: Without dead ends: 110 [2021-05-02 16:16:09,524 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 384.8ms TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-05-02 16:16:09,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-05-02 16:16:09,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 101. [2021-05-02 16:16:09,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 75 states have (on average 1.3466666666666667) internal successors, (101), 79 states have internal predecessors, (101), 17 states have call successors, (17), 9 states have call predecessors, (17), 8 states have return successors, (15), 12 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 16:16:09,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 133 transitions. [2021-05-02 16:16:09,531 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 133 transitions. Word has length 35 [2021-05-02 16:16:09,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:16:09,531 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 133 transitions. [2021-05-02 16:16:09,531 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 16:16:09,531 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 133 transitions. [2021-05-02 16:16:09,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 16:16:09,532 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:16:09,532 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:16:09,732 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 16:16:09,732 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:16:09,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:16:09,733 INFO L82 PathProgramCache]: Analyzing trace with hash 604176890, now seen corresponding path program 2 times [2021-05-02 16:16:09,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:16:09,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788194325] [2021-05-02 16:16:09,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:16:09,737 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:16:09,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1751490748] [2021-05-02 16:16:09,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:16:09,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 16:16:09,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:16:09,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 16:16:09,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:16:09,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:09,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:09,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:09,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:09,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:09,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:09,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:09,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:09,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:09,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:09,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:09,846 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:16:09,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:16:09,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788194325] [2021-05-02 16:16:09,847 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:16:09,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751490748] [2021-05-02 16:16:09,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751490748] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:16:09,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:16:09,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 16:16:09,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969763010] [2021-05-02 16:16:09,847 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 16:16:09,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:16:09,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 16:16:09,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 16:16:09,849 INFO L87 Difference]: Start difference. First operand 101 states and 133 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 16:16:09,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:16:09,887 INFO L93 Difference]: Finished difference Result 128 states and 171 transitions. [2021-05-02 16:16:09,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 16:16:09,897 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Word has length 36 [2021-05-02 16:16:09,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:16:09,900 INFO L225 Difference]: With dead ends: 128 [2021-05-02 16:16:09,900 INFO L226 Difference]: Without dead ends: 120 [2021-05-02 16:16:09,901 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 27.3ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-02 16:16:09,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-05-02 16:16:09,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2021-05-02 16:16:09,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 94 states have (on average 1.3297872340425532) internal successors, (125), 96 states have internal predecessors, (125), 17 states have call successors, (17), 9 states have call predecessors, (17), 8 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 16:16:09,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 157 transitions. [2021-05-02 16:16:09,909 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 157 transitions. Word has length 36 [2021-05-02 16:16:09,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:16:09,909 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 157 transitions. [2021-05-02 16:16:09,909 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 16:16:09,909 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 157 transitions. [2021-05-02 16:16:09,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 16:16:09,910 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:16:09,910 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:16:10,124 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:16:10,125 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:16:10,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:16:10,125 INFO L82 PathProgramCache]: Analyzing trace with hash 605964350, now seen corresponding path program 2 times [2021-05-02 16:16:10,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:16:10,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189107073] [2021-05-02 16:16:10,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:16:10,133 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:16:10,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [451072941] [2021-05-02 16:16:10,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:16:10,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 16:16:10,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:16:10,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 51 conjunts are in the unsatisfiable core [2021-05-02 16:16:10,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:16:10,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:10,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:10,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:10,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:10,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:10,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:22,209 WARN L205 SmtUtils]: Spent 9.88 s on a formula simplification that was a NOOP. DAG size: 26 [2021-05-02 16:16:35,464 WARN L205 SmtUtils]: Spent 13.22 s on a formula simplification. DAG size of input: 47 DAG size of output: 34 [2021-05-02 16:16:35,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:35,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:35,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:35,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:35,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:35,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:35,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:35,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:35,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:35,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:35,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:35,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:35,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:35,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:35,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:35,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:35,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:35,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:35,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:35,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:35,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:35,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:35,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:35,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:35,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:35,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:35,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:35,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:35,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:35,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:35,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:35,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:35,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:35,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:35,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:35,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:35,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:35,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:35,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:35,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:35,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:35,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:35,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:35,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:35,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:35,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:35,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:35,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:36,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:36,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:36,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:36,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:36,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:16:36,685 WARN L159 QuantifierPusher]: Ignoring assumption.