/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/hard-ll_valuebound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 03:09:41,428 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 03:09:41,430 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 03:09:41,461 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 03:09:41,475 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 03:09:41,477 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 03:09:41,477 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 03:09:41,479 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 03:09:41,480 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 03:09:41,481 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 03:09:41,483 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 03:09:41,487 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 03:09:41,489 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 03:09:41,490 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 03:09:41,491 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 03:09:41,492 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 03:09:41,497 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 03:09:41,503 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 03:09:41,503 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 03:09:41,504 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 03:09:41,505 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-06 03:09:41,532 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 03:09:41,532 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 03:09:41,535 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 03:09:41,535 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 03:09:41,535 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 03:09:41,535 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 03:09:41,535 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 03:09:41,535 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 03:09:41,535 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 03:09:41,556 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 03:09:41,557 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 03:09:41,557 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 03:09:41,557 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 03:09:41,557 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 03:09:41,557 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 03:09:41,557 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 03:09:41,557 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 03:09:41,557 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 03:09:41,558 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 03:09:41,558 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 03:09:41,558 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 03:09:41,558 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 03:09:41,558 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 03:09:41,558 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 03:09:41,558 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 03:09:41,558 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 03:09:41,558 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 03:09:41,558 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 03:09:41,559 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 03:09:41,811 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 03:09:41,828 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 03:09:41,830 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 03:09:41,831 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 03:09:41,831 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 03:09:41,832 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound1.c [2021-05-06 03:09:41,893 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec6996fc3/aa4f4c2ca4c14261a75fee789ea1a35f/FLAG2528a253b [2021-05-06 03:09:42,258 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 03:09:42,258 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound1.c [2021-05-06 03:09:42,263 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec6996fc3/aa4f4c2ca4c14261a75fee789ea1a35f/FLAG2528a253b [2021-05-06 03:09:42,278 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec6996fc3/aa4f4c2ca4c14261a75fee789ea1a35f [2021-05-06 03:09:42,280 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 03:09:42,281 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 03:09:42,284 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 03:09:42,284 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 03:09:42,287 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 03:09:42,287 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 03:09:42" (1/1) ... [2021-05-06 03:09:42,288 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3fd43a15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:09:42, skipping insertion in model container [2021-05-06 03:09:42,288 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 03:09:42" (1/1) ... [2021-05-06 03:09:42,292 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 03:09:42,303 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 03:09:42,415 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/hard-ll_valuebound1.c[546,559] [2021-05-06 03:09:42,431 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 03:09:42,439 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 03:09:42,476 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/hard-ll_valuebound1.c[546,559] [2021-05-06 03:09:42,485 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 03:09:42,494 INFO L208 MainTranslator]: Completed translation [2021-05-06 03:09:42,495 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:09:42 WrapperNode [2021-05-06 03:09:42,495 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 03:09:42,496 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 03:09:42,496 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 03:09:42,497 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 03:09:42,504 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:09:42" (1/1) ... [2021-05-06 03:09:42,505 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:09:42" (1/1) ... [2021-05-06 03:09:42,514 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:09:42" (1/1) ... [2021-05-06 03:09:42,514 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:09:42" (1/1) ... [2021-05-06 03:09:42,517 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:09:42" (1/1) ... [2021-05-06 03:09:42,520 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:09:42" (1/1) ... [2021-05-06 03:09:42,521 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:09:42" (1/1) ... [2021-05-06 03:09:42,522 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 03:09:42,522 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 03:09:42,522 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 03:09:42,522 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 03:09:42,523 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:09:42" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 03:09:42,594 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 03:09:42,594 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 03:09:42,594 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 03:09:42,594 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 03:09:42,594 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 03:09:42,594 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 03:09:42,595 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 03:09:42,595 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 03:09:42,595 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 03:09:42,595 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 03:09:42,595 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-06 03:09:42,595 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 03:09:42,596 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 03:09:42,596 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 03:09:42,596 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 03:09:42,597 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 03:09:42,597 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 03:09:42,597 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 03:09:42,597 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 03:09:42,597 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 03:09:42,768 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 03:09:42,769 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 03:09:42,769 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 03:09:42 BoogieIcfgContainer [2021-05-06 03:09:42,770 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 03:09:42,770 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 03:09:42,771 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 03:09:42,772 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 03:09:42,772 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 03:09:42" (1/3) ... [2021-05-06 03:09:42,773 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46eb84f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 03:09:42, skipping insertion in model container [2021-05-06 03:09:42,773 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:09:42" (2/3) ... [2021-05-06 03:09:42,773 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46eb84f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 03:09:42, skipping insertion in model container [2021-05-06 03:09:42,773 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 03:09:42" (3/3) ... [2021-05-06 03:09:42,774 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-ll_valuebound1.c [2021-05-06 03:09:42,777 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 03:09:42,779 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 03:09:42,790 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 03:09:42,804 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 03:09:42,804 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 03:09:42,804 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 03:09:42,804 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 03:09:42,804 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 03:09:42,805 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 03:09:42,805 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 03:09:42,805 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 03:09:42,815 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 03:09:42,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 03:09:42,818 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:09:42,819 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:09:42,819 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:09:42,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:09:42,822 INFO L82 PathProgramCache]: Analyzing trace with hash -1784424332, now seen corresponding path program 1 times [2021-05-06 03:09:42,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:09:42,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425593510] [2021-05-06 03:09:42,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:09:42,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:09:42,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 03:09:43,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:09:43,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 03:09:43,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:09:43,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 03:09:43,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:09:43,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 03:09:43,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:09:43,020 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 03:09:43,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:09:43,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425593510] [2021-05-06 03:09:43,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425593510] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:09:43,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:09:43,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 03:09:43,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963677640] [2021-05-06 03:09:43,025 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 03:09:43,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:09:43,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 03:09:43,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 03:09:43,033 INFO L87 Difference]: Start difference. First operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 03:09:43,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:09:43,123 INFO L93 Difference]: Finished difference Result 69 states and 110 transitions. [2021-05-06 03:09:43,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 03:09:43,124 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2021-05-06 03:09:43,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:09:43,129 INFO L225 Difference]: With dead ends: 69 [2021-05-06 03:09:43,129 INFO L226 Difference]: Without dead ends: 33 [2021-05-06 03:09:43,131 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 03:09:43,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-06 03:09:43,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-06 03:09:43,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 03:09:43,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2021-05-06 03:09:43,167 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 28 [2021-05-06 03:09:43,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:09:43,167 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2021-05-06 03:09:43,167 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 03:09:43,168 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2021-05-06 03:09:43,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 03:09:43,169 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:09:43,169 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:09:43,169 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 03:09:43,169 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:09:43,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:09:43,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1361835634, now seen corresponding path program 1 times [2021-05-06 03:09:43,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:09:43,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299458901] [2021-05-06 03:09:43,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:09:43,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:09:43,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 03:09:43,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:09:43,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 03:09:43,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:09:43,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 03:09:43,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:09:43,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 03:09:43,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:09:43,350 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 03:09:43,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:09:43,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299458901] [2021-05-06 03:09:43,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299458901] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:09:43,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:09:43,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 03:09:43,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160891300] [2021-05-06 03:09:43,352 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 03:09:43,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:09:43,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 03:09:43,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:09:43,353 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 03:09:43,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:09:43,602 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2021-05-06 03:09:43,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 03:09:43,602 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2021-05-06 03:09:43,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:09:43,604 INFO L225 Difference]: With dead ends: 46 [2021-05-06 03:09:43,604 INFO L226 Difference]: Without dead ends: 44 [2021-05-06 03:09:43,606 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 108.4ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 03:09:43,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-06 03:09:43,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2021-05-06 03:09:43,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 03:09:43,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2021-05-06 03:09:43,627 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 28 [2021-05-06 03:09:43,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:09:43,629 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2021-05-06 03:09:43,630 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 03:09:43,630 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2021-05-06 03:09:43,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 03:09:43,631 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:09:43,635 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:09:43,635 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 03:09:43,635 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:09:43,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:09:43,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1382067636, now seen corresponding path program 1 times [2021-05-06 03:09:43,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:09:43,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893716019] [2021-05-06 03:09:43,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:09:43,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:09:43,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 03:09:43,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:09:43,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 03:09:43,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:09:43,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 03:09:43,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:09:43,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 03:09:43,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:09:43,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-05-06 03:09:43,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:09:43,774 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 03:09:43,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:09:43,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893716019] [2021-05-06 03:09:43,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893716019] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:09:43,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:09:43,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 03:09:43,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980727043] [2021-05-06 03:09:43,791 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 03:09:43,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:09:43,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 03:09:43,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:09:43,792 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 03:09:44,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:09:44,035 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2021-05-06 03:09:44,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 03:09:44,035 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-06 03:09:44,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:09:44,036 INFO L225 Difference]: With dead ends: 50 [2021-05-06 03:09:44,036 INFO L226 Difference]: Without dead ends: 48 [2021-05-06 03:09:44,037 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 116.4ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 03:09:44,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-06 03:09:44,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2021-05-06 03:09:44,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 03:09:44,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2021-05-06 03:09:44,043 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 33 [2021-05-06 03:09:44,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:09:44,043 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2021-05-06 03:09:44,043 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 03:09:44,043 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2021-05-06 03:09:44,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-06 03:09:44,044 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:09:44,044 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:09:44,044 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-06 03:09:44,044 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:09:44,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:09:44,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1455208590, now seen corresponding path program 1 times [2021-05-06 03:09:44,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:09:44,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600406926] [2021-05-06 03:09:44,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:09:44,053 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:09:44,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1612167939] [2021-05-06 03:09:44,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:09:44,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:09:44,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 03:09:44,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:09:44,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:44,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:44,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:44,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:44,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:44,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:44,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:44,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:44,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:44,307 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-05-06 03:09:44,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:09:44,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600406926] [2021-05-06 03:09:44,308 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:09:44,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612167939] [2021-05-06 03:09:44,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612167939] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:09:44,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:09:44,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-06 03:09:44,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950374745] [2021-05-06 03:09:44,309 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 03:09:44,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:09:44,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 03:09:44,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-06 03:09:44,309 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 9 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 03:09:44,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:09:44,429 INFO L93 Difference]: Finished difference Result 69 states and 89 transitions. [2021-05-06 03:09:44,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 03:09:44,430 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 38 [2021-05-06 03:09:44,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:09:44,430 INFO L225 Difference]: With dead ends: 69 [2021-05-06 03:09:44,430 INFO L226 Difference]: Without dead ends: 55 [2021-05-06 03:09:44,431 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 51.4ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-06 03:09:44,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-06 03:09:44,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-05-06 03:09:44,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 32 states have internal predecessors, (35), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 03:09:44,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2021-05-06 03:09:44,439 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 38 [2021-05-06 03:09:44,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:09:44,439 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2021-05-06 03:09:44,439 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 03:09:44,439 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2021-05-06 03:09:44,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-06 03:09:44,440 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:09:44,440 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:09:44,657 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:09:44,657 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:09:44,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:09:44,658 INFO L82 PathProgramCache]: Analyzing trace with hash -1688067263, now seen corresponding path program 1 times [2021-05-06 03:09:44,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:09:44,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233669104] [2021-05-06 03:09:44,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:09:44,664 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:09:44,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [274584859] [2021-05-06 03:09:44,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:09:44,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:09:44,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 03:09:44,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:09:44,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:44,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:44,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:44,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:44,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:44,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:44,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:44,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:44,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:44,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:44,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:44,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:44,946 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-05-06 03:09:44,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:09:44,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233669104] [2021-05-06 03:09:44,946 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:09:44,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274584859] [2021-05-06 03:09:44,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274584859] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:09:44,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:09:44,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 03:09:44,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562551175] [2021-05-06 03:09:44,947 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 03:09:44,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:09:44,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 03:09:44,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 03:09:44,953 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 03:09:45,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:09:45,097 INFO L93 Difference]: Finished difference Result 69 states and 79 transitions. [2021-05-06 03:09:45,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 03:09:45,097 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 45 [2021-05-06 03:09:45,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:09:45,098 INFO L225 Difference]: With dead ends: 69 [2021-05-06 03:09:45,098 INFO L226 Difference]: Without dead ends: 58 [2021-05-06 03:09:45,099 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 64.4ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-06 03:09:45,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-06 03:09:45,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-05-06 03:09:45,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 35 states have internal predecessors, (38), 15 states have call successors, (15), 9 states have call predecessors, (15), 8 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 03:09:45,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2021-05-06 03:09:45,105 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 45 [2021-05-06 03:09:45,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:09:45,105 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2021-05-06 03:09:45,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 03:09:45,105 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2021-05-06 03:09:45,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-06 03:09:45,106 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:09:45,106 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:09:45,320 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:09:45,321 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:09:45,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:09:45,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1471734606, now seen corresponding path program 1 times [2021-05-06 03:09:45,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:09:45,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422612417] [2021-05-06 03:09:45,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:09:45,328 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:09:45,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1511516773] [2021-05-06 03:09:45,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:09:45,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:09:45,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-06 03:09:45,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:09:45,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:45,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:45,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:45,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:45,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:45,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:45,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:45,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:45,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:45,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:45,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:45,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:45,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:45,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:45,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:45,577 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-05-06 03:09:45,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:09:45,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422612417] [2021-05-06 03:09:45,578 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:09:45,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511516773] [2021-05-06 03:09:45,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511516773] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:09:45,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:09:45,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 03:09:45,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172701329] [2021-05-06 03:09:45,579 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 03:09:45,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:09:45,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 03:09:45,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-06 03:09:45,579 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-06 03:09:45,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:09:45,743 INFO L93 Difference]: Finished difference Result 91 states and 115 transitions. [2021-05-06 03:09:45,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 03:09:45,744 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 55 [2021-05-06 03:09:45,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:09:45,746 INFO L225 Difference]: With dead ends: 91 [2021-05-06 03:09:45,747 INFO L226 Difference]: Without dead ends: 77 [2021-05-06 03:09:45,747 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 56.4ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-06 03:09:45,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-05-06 03:09:45,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2021-05-06 03:09:45,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 46 states have internal predecessors, (50), 23 states have call successors, (23), 10 states have call predecessors, (23), 9 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-06 03:09:45,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 93 transitions. [2021-05-06 03:09:45,771 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 93 transitions. Word has length 55 [2021-05-06 03:09:45,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:09:45,771 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 93 transitions. [2021-05-06 03:09:45,771 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-06 03:09:45,771 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 93 transitions. [2021-05-06 03:09:45,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-05-06 03:09:45,774 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:09:45,774 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:09:45,988 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:09:45,989 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:09:45,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:09:45,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1784683007, now seen corresponding path program 1 times [2021-05-06 03:09:45,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:09:45,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649856783] [2021-05-06 03:09:45,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:09:45,996 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:09:45,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [779929644] [2021-05-06 03:09:45,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:09:46,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:09:46,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 03:09:46,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:09:46,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:46,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:46,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:46,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:46,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:46,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:46,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:46,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:46,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:46,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:46,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:46,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:46,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:46,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:46,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:46,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:46,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:46,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:46,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:46,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:46,348 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-05-06 03:09:46,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:09:46,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649856783] [2021-05-06 03:09:46,348 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:09:46,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779929644] [2021-05-06 03:09:46,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779929644] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:09:46,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:09:46,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 03:09:46,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095469221] [2021-05-06 03:09:46,349 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 03:09:46,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:09:46,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 03:09:46,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-06 03:09:46,349 INFO L87 Difference]: Start difference. First operand 77 states and 93 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 03:09:46,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:09:46,560 INFO L93 Difference]: Finished difference Result 104 states and 118 transitions. [2021-05-06 03:09:46,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 03:09:46,561 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 62 [2021-05-06 03:09:46,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:09:46,563 INFO L225 Difference]: With dead ends: 104 [2021-05-06 03:09:46,563 INFO L226 Difference]: Without dead ends: 89 [2021-05-06 03:09:46,566 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 125.1ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-05-06 03:09:46,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-05-06 03:09:46,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-05-06 03:09:46,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 53 states have (on average 1.0943396226415094) internal successors, (58), 55 states have internal predecessors, (58), 23 states have call successors, (23), 13 states have call predecessors, (23), 12 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-06 03:09:46,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 101 transitions. [2021-05-06 03:09:46,579 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 101 transitions. Word has length 62 [2021-05-06 03:09:46,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:09:46,579 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 101 transitions. [2021-05-06 03:09:46,580 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 03:09:46,580 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 101 transitions. [2021-05-06 03:09:46,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-06 03:09:46,582 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:09:46,582 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:09:46,801 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:09:46,801 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:09:46,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:09:46,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1254068366, now seen corresponding path program 2 times [2021-05-06 03:09:46,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:09:46,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968983288] [2021-05-06 03:09:46,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:09:46,807 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:09:46,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [527241003] [2021-05-06 03:09:46,807 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:09:46,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 03:09:46,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:09:46,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 03:09:46,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:09:46,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:46,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:46,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:46,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:46,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:46,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:46,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:46,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:46,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:46,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:46,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:46,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:46,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:46,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:46,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:46,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:46,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:46,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:46,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:46,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:46,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:46,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:46,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:46,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:46,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:46,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:46,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:46,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:46,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:46,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:46,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:46,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:47,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:47,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:47,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:47,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:47,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:47,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:47,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:47,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:47,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:47,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:47,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:47,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:47,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:47,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:47,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:47,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:47,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:47,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:47,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:47,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:47,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:47,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:47,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:47,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:47,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:47,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:47,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:47,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:47,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:47,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:47,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:47,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:47,078 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 76 proven. 3 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-05-06 03:09:47,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:09:47,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968983288] [2021-05-06 03:09:47,078 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:09:47,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527241003] [2021-05-06 03:09:47,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527241003] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:09:47,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:09:47,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 03:09:47,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919515698] [2021-05-06 03:09:47,080 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 03:09:47,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:09:47,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 03:09:47,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 03:09:47,081 INFO L87 Difference]: Start difference. First operand 89 states and 101 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 03:09:47,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:09:47,168 INFO L93 Difference]: Finished difference Result 95 states and 106 transitions. [2021-05-06 03:09:47,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 03:09:47,168 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) Word has length 72 [2021-05-06 03:09:47,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:09:47,169 INFO L225 Difference]: With dead ends: 95 [2021-05-06 03:09:47,169 INFO L226 Difference]: Without dead ends: 69 [2021-05-06 03:09:47,171 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 63.0ms TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-05-06 03:09:47,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-06 03:09:47,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-05-06 03:09:47,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 43 states have internal predecessors, (43), 16 states have call successors, (16), 11 states have call predecessors, (16), 10 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-06 03:09:47,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2021-05-06 03:09:47,178 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 72 [2021-05-06 03:09:47,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:09:47,178 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2021-05-06 03:09:47,178 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 03:09:47,178 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2021-05-06 03:09:47,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-06 03:09:47,179 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:09:47,179 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:09:47,392 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:09:47,393 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:09:47,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:09:47,393 INFO L82 PathProgramCache]: Analyzing trace with hash 680531353, now seen corresponding path program 1 times [2021-05-06 03:09:47,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:09:47,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581432181] [2021-05-06 03:09:47,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:09:47,399 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:09:47,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [266497624] [2021-05-06 03:09:47,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:09:47,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:09:47,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-06 03:09:47,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:09:47,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:47,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:47,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:47,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:47,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:47,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:47,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:47,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:47,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:47,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:47,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:47,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:47,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:47,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:47,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:47,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:47,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:47,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:47,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:47,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:47,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:47,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:47,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:47,833 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 21 proven. 29 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-05-06 03:09:47,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:09:47,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581432181] [2021-05-06 03:09:47,833 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:09:47,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266497624] [2021-05-06 03:09:47,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266497624] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:09:47,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:09:47,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 03:09:47,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726027187] [2021-05-06 03:09:47,834 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 03:09:47,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:09:47,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 03:09:47,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-05-06 03:09:47,835 INFO L87 Difference]: Start difference. First operand 69 states and 73 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 6 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 03:09:48,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:09:48,002 INFO L93 Difference]: Finished difference Result 79 states and 81 transitions. [2021-05-06 03:09:48,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 03:09:48,003 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 6 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 75 [2021-05-06 03:09:48,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:09:48,004 INFO L225 Difference]: With dead ends: 79 [2021-05-06 03:09:48,004 INFO L226 Difference]: Without dead ends: 75 [2021-05-06 03:09:48,005 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 144.0ms TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-05-06 03:09:48,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-05-06 03:09:48,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-05-06 03:09:48,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 47 states have (on average 1.0) internal successors, (47), 47 states have internal predecessors, (47), 16 states have call successors, (16), 13 states have call predecessors, (16), 11 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-06 03:09:48,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2021-05-06 03:09:48,012 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 75 [2021-05-06 03:09:48,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:09:48,012 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2021-05-06 03:09:48,012 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 6 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 03:09:48,012 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2021-05-06 03:09:48,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-06 03:09:48,013 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:09:48,013 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:09:48,228 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:09:48,229 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:09:48,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:09:48,229 INFO L82 PathProgramCache]: Analyzing trace with hash -815356955, now seen corresponding path program 1 times [2021-05-06 03:09:48,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:09:48,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424660975] [2021-05-06 03:09:48,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:09:48,235 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:09:48,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1809765586] [2021-05-06 03:09:48,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:09:48,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:09:48,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-06 03:09:48,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:09:48,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:48,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:48,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:48,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:48,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:48,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:48,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:48,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:48,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:48,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:48,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:48,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:48,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:48,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:48,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:48,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:48,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:48,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:48,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:48,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:48,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:48,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:48,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:48,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:48,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:48,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:48,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:48,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:48,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:48,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:48,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:48,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:48,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:48,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:48,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:48,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:48,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:48,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:48,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:48,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:48,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:48,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:48,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:49,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:49,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:49,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:49,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:49,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:49,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:49,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:49,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:49,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:49,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:49,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:49,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:49,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:49,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:49,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:49,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:49,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:49,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:49,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:49,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:49,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:49,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:49,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:49,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:49,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:49,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:49,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:49,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:49,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:49,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:50,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:50,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:50,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:50,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:50,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:50,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:50,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:50,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:50,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:50,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:50,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:50,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:50,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:50,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:50,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:50,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:50,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:50,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:50,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:50,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:50,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:50,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:50,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:50,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:50,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:50,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:50,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:50,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:09:50,547 WARN L159 QuantifierPusher]: Ignoring assumption.