/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/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 21:51:55,403 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 21:51:55,404 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 21:51:55,429 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 21:51:55,429 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 21:51:55,432 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 21:51:55,434 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 21:51:55,440 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 21:51:55,441 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 21:51:55,445 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 21:51:55,445 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 21:51:55,446 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 21:51:55,447 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 21:51:55,448 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 21:51:55,449 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 21:51:55,450 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 21:51:55,452 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 21:51:55,453 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 21:51:55,454 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 21:51:55,466 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 21:51:55,467 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 21:51:55,468 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 21:51:55,469 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 21:51:55,470 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 21:51:55,475 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 21:51:55,481 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 21:51:55,482 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 21:51:55,482 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 21:51:55,486 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 21:51:55,499 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 21:51:55,499 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 21:51:55,501 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 21:51:55,501 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 21:51:55,501 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 21:51:55,501 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 21:51:55,502 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 21:51:55,502 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 21:51:55,502 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 21:51:55,502 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 21:51:55,503 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 21:51:55,503 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 21:51:55,503 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 21:51:55,503 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 21:51:55,504 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 21:51:55,504 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 21:51:55,504 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 21:51:55,504 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 21:51:55,504 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 21:51:55,504 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 21:51:55,504 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 21:51:55,505 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 21:51:55,505 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 21:51:55,759 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 21:51:55,771 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 21:51:55,773 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 21:51:55,773 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 21:51:55,774 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 21:51:55,774 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_unwindbound100.c [2021-05-02 21:51:55,835 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca7b26832/62a7593829de4d3ca903853a1c440c89/FLAG522e4998f [2021-05-02 21:51:56,155 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 21:51:56,155 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_unwindbound100.c [2021-05-02 21:51:56,159 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca7b26832/62a7593829de4d3ca903853a1c440c89/FLAG522e4998f [2021-05-02 21:51:56,168 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca7b26832/62a7593829de4d3ca903853a1c440c89 [2021-05-02 21:51:56,169 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 21:51:56,171 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 21:51:56,174 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 21:51:56,174 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 21:51:56,176 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 21:51:56,177 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 09:51:56" (1/1) ... [2021-05-02 21:51:56,178 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fb29310 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:51:56, skipping insertion in model container [2021-05-02 21:51:56,178 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 09:51:56" (1/1) ... [2021-05-02 21:51:56,182 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 21:51:56,192 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 21:51:56,265 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/prodbin-ll_unwindbound100.c[537,550] [2021-05-02 21:51:56,274 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 21:51:56,279 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 21:51:56,295 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/prodbin-ll_unwindbound100.c[537,550] [2021-05-02 21:51:56,298 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 21:51:56,324 INFO L208 MainTranslator]: Completed translation [2021-05-02 21:51:56,324 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:51:56 WrapperNode [2021-05-02 21:51:56,324 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 21:51:56,325 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 21:51:56,325 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 21:51:56,325 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 21:51:56,331 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:51:56" (1/1) ... [2021-05-02 21:51:56,331 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:51:56" (1/1) ... [2021-05-02 21:51:56,335 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:51:56" (1/1) ... [2021-05-02 21:51:56,335 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:51:56" (1/1) ... [2021-05-02 21:51:56,338 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:51:56" (1/1) ... [2021-05-02 21:51:56,340 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:51:56" (1/1) ... [2021-05-02 21:51:56,341 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:51:56" (1/1) ... [2021-05-02 21:51:56,342 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 21:51:56,343 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 21:51:56,343 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 21:51:56,343 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 21:51:56,343 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:51:56" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 21:51:56,384 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 21:51:56,384 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 21:51:56,384 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 21:51:56,385 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 21:51:56,385 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 21:51:56,385 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 21:51:56,385 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 21:51:56,385 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 21:51:56,385 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 21:51:56,385 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 21:51:56,385 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 21:51:56,385 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 21:51:56,385 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 21:51:56,385 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 21:51:56,386 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 21:51:56,386 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 21:51:56,386 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 21:51:56,386 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 21:51:56,386 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 21:51:56,386 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 21:51:56,582 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 21:51:56,582 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 21:51:56,583 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 09:51:56 BoogieIcfgContainer [2021-05-02 21:51:56,583 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 21:51:56,584 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 21:51:56,584 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 21:51:56,584 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 21:51:56,586 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 09:51:56" (1/1) ... [2021-05-02 21:51:56,597 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 09:51:56 BasicIcfg [2021-05-02 21:51:56,598 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 21:51:56,599 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 21:51:56,599 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 21:51:56,601 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 21:51:56,601 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 09:51:56" (1/4) ... [2021-05-02 21:51:56,601 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@347f0d14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 09:51:56, skipping insertion in model container [2021-05-02 21:51:56,601 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:51:56" (2/4) ... [2021-05-02 21:51:56,602 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@347f0d14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 09:51:56, skipping insertion in model container [2021-05-02 21:51:56,602 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 09:51:56" (3/4) ... [2021-05-02 21:51:56,602 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@347f0d14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 09:51:56, skipping insertion in model container [2021-05-02 21:51:56,602 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 09:51:56" (4/4) ... [2021-05-02 21:51:56,603 INFO L111 eAbstractionObserver]: Analyzing ICFG prodbin-ll_unwindbound100.cJordan [2021-05-02 21:51:56,606 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 21:51:56,609 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 21:51:56,620 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 21:51:56,633 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 21:51:56,633 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 21:51:56,633 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 21:51:56,633 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 21:51:56,633 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 21:51:56,633 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 21:51:56,633 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 21:51:56,633 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 21:51:56,641 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 21:51:56,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 21:51:56,646 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:51:56,646 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 21:51:56,646 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:51:56,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:51:56,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1957529129, now seen corresponding path program 1 times [2021-05-02 21:51:56,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:51:56,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970170808] [2021-05-02 21:51:56,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:51:56,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:51:56,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 21:51:56,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:51:56,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 21:51:56,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:51:56,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 21:51:56,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:51:56,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970170808] [2021-05-02 21:51:56,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970170808] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 21:51:56,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 21:51:56,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 21:51:56,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341263453] [2021-05-02 21:51:56,858 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 21:51:56,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:51:56,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 21:51:56,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 21:51:56,867 INFO L87 Difference]: Start difference. First operand has 30 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 21:51:56,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:51:56,912 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2021-05-02 21:51:56,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 21:51:56,913 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-02 21:51:56,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:51:56,918 INFO L225 Difference]: With dead ends: 31 [2021-05-02 21:51:56,918 INFO L226 Difference]: Without dead ends: 26 [2021-05-02 21:51:56,919 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 21:51:56,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-02 21:51:56,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-05-02 21:51:56,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 21:51:56,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-05-02 21:51:56,941 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 17 [2021-05-02 21:51:56,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:51:56,942 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-05-02 21:51:56,942 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 21:51:56,942 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-05-02 21:51:56,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 21:51:56,943 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:51:56,943 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 21:51:56,943 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 21:51:56,943 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:51:56,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:51:56,944 INFO L82 PathProgramCache]: Analyzing trace with hash 583261658, now seen corresponding path program 1 times [2021-05-02 21:51:56,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:51:56,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57075764] [2021-05-02 21:51:56,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:51:56,970 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:51:56,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2011703635] [2021-05-02 21:51:56,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:51:57,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:51:57,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 21:51:57,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:51:57,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:51:57,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:51:57,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:51:57,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:51:57,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:51:57,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 21:51:57,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:51:57,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57075764] [2021-05-02 21:51:57,149 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:51:57,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011703635] [2021-05-02 21:51:57,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011703635] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 21:51:57,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 21:51:57,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 21:51:57,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591920977] [2021-05-02 21:51:57,153 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 21:51:57,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:51:57,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 21:51:57,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 21:51:57,154 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 21:51:57,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:51:57,164 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2021-05-02 21:51:57,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 21:51:57,164 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2021-05-02 21:51:57,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:51:57,165 INFO L225 Difference]: With dead ends: 27 [2021-05-02 21:51:57,165 INFO L226 Difference]: Without dead ends: 27 [2021-05-02 21:51:57,167 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.1ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 21:51:57,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-02 21:51:57,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-02 21:51:57,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 21:51:57,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2021-05-02 21:51:57,175 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 18 [2021-05-02 21:51:57,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:51:57,175 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2021-05-02 21:51:57,175 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 21:51:57,175 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2021-05-02 21:51:57,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 21:51:57,179 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:51:57,180 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 21:51:57,392 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 21:51:57,393 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:51:57,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:51:57,394 INFO L82 PathProgramCache]: Analyzing trace with hash 584363925, now seen corresponding path program 1 times [2021-05-02 21:51:57,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:51:57,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324803167] [2021-05-02 21:51:57,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:51:57,403 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:51:57,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1429320423] [2021-05-02 21:51:57,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:51:57,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:51:57,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 21:51:57,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:51:57,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:51:57,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:51:57,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 21:51:57,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:51:57,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324803167] [2021-05-02 21:51:57,529 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:51:57,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429320423] [2021-05-02 21:51:57,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429320423] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 21:51:57,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 21:51:57,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 21:51:57,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262826169] [2021-05-02 21:51:57,530 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 21:51:57,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:51:57,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 21:51:57,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 21:51:57,532 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 8 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 21:51:57,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:51:57,595 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2021-05-02 21:51:57,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 21:51:57,596 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-02 21:51:57,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:51:57,597 INFO L225 Difference]: With dead ends: 35 [2021-05-02 21:51:57,597 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 21:51:57,598 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 35.4ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 21:51:57,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 21:51:57,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2021-05-02 21:51:57,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 21:51:57,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2021-05-02 21:51:57,605 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 18 [2021-05-02 21:51:57,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:51:57,606 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2021-05-02 21:51:57,606 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 21:51:57,606 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2021-05-02 21:51:57,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 21:51:57,607 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:51:57,607 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 21:51:57,822 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:51:57,823 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:51:57,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:51:57,823 INFO L82 PathProgramCache]: Analyzing trace with hash 919545147, now seen corresponding path program 1 times [2021-05-02 21:51:57,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:51:57,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798644750] [2021-05-02 21:51:57,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:51:57,831 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:51:57,832 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [430466174] [2021-05-02 21:51:57,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:51:57,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:51:57,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 21:51:57,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:51:57,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:51:57,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:51:57,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:51:57,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:51:57,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:51:57,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:51:57,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:51:57,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:51:57,942 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 21:51:57,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:51:57,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798644750] [2021-05-02 21:51:57,943 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:51:57,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430466174] [2021-05-02 21:51:57,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430466174] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 21:51:57,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 21:51:57,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 21:51:57,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189620092] [2021-05-02 21:51:57,943 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 21:51:57,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:51:57,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 21:51:57,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 21:51:57,944 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 21:51:57,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:51:57,967 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2021-05-02 21:51:57,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 21:51:57,967 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-05-02 21:51:57,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:51:57,968 INFO L225 Difference]: With dead ends: 37 [2021-05-02 21:51:57,968 INFO L226 Difference]: Without dead ends: 37 [2021-05-02 21:51:57,968 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 18.7ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 21:51:57,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-05-02 21:51:57,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-05-02 21:51:57,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 27 states have internal predecessors, (31), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 21:51:57,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2021-05-02 21:51:57,971 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 28 [2021-05-02 21:51:57,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:51:57,971 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2021-05-02 21:51:57,971 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 21:51:57,971 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2021-05-02 21:51:57,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 21:51:57,972 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:51:57,972 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 21:51:58,184 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:51:58,187 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:51:58,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:51:58,187 INFO L82 PathProgramCache]: Analyzing trace with hash 920647414, now seen corresponding path program 1 times [2021-05-02 21:51:58,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:51:58,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968754014] [2021-05-02 21:51:58,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:51:58,200 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:51:58,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [750181504] [2021-05-02 21:51:58,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:51:58,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:51:58,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-02 21:51:58,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:51:58,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:51:58,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:51:58,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:51:58,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:51:58,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:51:58,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:51:58,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:51:58,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:51:58,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:51:58,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:51:58,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:51:58,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:51:58,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:51:58,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:51:58,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:51:58,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:51:58,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:51:58,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:51:58,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:51:58,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:51:58,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:51:58,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:51:58,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:51:58,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:51:58,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:51:58,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:51:58,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:51:58,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:51:58,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:51:58,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:51:58,543 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 21:51:58,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:51:58,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968754014] [2021-05-02 21:51:58,544 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:51:58,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750181504] [2021-05-02 21:51:58,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750181504] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 21:51:58,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 21:51:58,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 21:51:58,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700133723] [2021-05-02 21:51:58,544 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 21:51:58,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:51:58,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 21:51:58,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-05-02 21:51:58,545 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 10 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 21:52:02,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:52:02,708 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2021-05-02 21:52:02,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 21:52:02,708 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 10 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2021-05-02 21:52:02,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:52:02,709 INFO L225 Difference]: With dead ends: 49 [2021-05-02 21:52:02,709 INFO L226 Difference]: Without dead ends: 49 [2021-05-02 21:52:02,709 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 108.0ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-05-02 21:52:02,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-02 21:52:02,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2021-05-02 21:52:02,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 32 states have (on average 1.15625) internal successors, (37), 34 states have internal predecessors, (37), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 21:52:02,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2021-05-02 21:52:02,712 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 28 [2021-05-02 21:52:02,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:52:02,712 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2021-05-02 21:52:02,713 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 10 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 21:52:02,713 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2021-05-02 21:52:02,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 21:52:02,713 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:52:02,713 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 21:52:02,930 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:52:02,931 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:52:02,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:52:02,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1631509547, now seen corresponding path program 1 times [2021-05-02 21:52:02,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:52:02,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772764640] [2021-05-02 21:52:02,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:52:02,939 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:52:02,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1054546361] [2021-05-02 21:52:02,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:52:02,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:52:02,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 21:52:02,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:52:03,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:03,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:03,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:03,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:03,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:03,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:03,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:03,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:03,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:03,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:03,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:03,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:03,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:03,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:03,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:03,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:03,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:03,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:03,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:03,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:03,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:03,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:03,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:03,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:03,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:03,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:03,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:03,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:03,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:03,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:03,222 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 21:52:03,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:52:03,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772764640] [2021-05-02 21:52:03,223 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:52:03,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054546361] [2021-05-02 21:52:03,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054546361] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 21:52:03,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 21:52:03,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 21:52:03,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301308428] [2021-05-02 21:52:03,223 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 21:52:03,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:52:03,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 21:52:03,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-02 21:52:03,224 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 21:52:03,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:52:03,320 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2021-05-02 21:52:03,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 21:52:03,320 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2021-05-02 21:52:03,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:52:03,322 INFO L225 Difference]: With dead ends: 53 [2021-05-02 21:52:03,322 INFO L226 Difference]: Without dead ends: 53 [2021-05-02 21:52:03,322 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 99.8ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-02 21:52:03,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-05-02 21:52:03,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2021-05-02 21:52:03,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 38 states have internal predecessors, (41), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 21:52:03,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2021-05-02 21:52:03,327 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 28 [2021-05-02 21:52:03,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:52:03,327 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2021-05-02 21:52:03,327 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 21:52:03,327 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2021-05-02 21:52:03,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 21:52:03,328 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:52:03,328 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 21:52:03,528 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:52:03,529 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:52:03,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:52:03,529 INFO L82 PathProgramCache]: Analyzing trace with hash -357510123, now seen corresponding path program 1 times [2021-05-02 21:52:03,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:52:03,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128132749] [2021-05-02 21:52:03,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:52:03,535 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:52:03,536 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1077574485] [2021-05-02 21:52:03,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:52:03,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:52:03,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 21:52:03,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:52:03,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:03,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:03,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:03,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:03,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:03,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:03,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:03,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:03,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:03,917 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 21:52:03,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:52:03,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128132749] [2021-05-02 21:52:03,917 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:52:03,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077574485] [2021-05-02 21:52:03,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077574485] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 21:52:03,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 21:52:03,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 21:52:03,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280964656] [2021-05-02 21:52:03,918 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 21:52:03,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:52:03,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 21:52:03,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-05-02 21:52:03,919 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 21:52:06,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:52:06,114 INFO L93 Difference]: Finished difference Result 57 states and 60 transitions. [2021-05-02 21:52:06,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 21:52:06,114 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 34 [2021-05-02 21:52:06,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:52:06,117 INFO L225 Difference]: With dead ends: 57 [2021-05-02 21:52:06,117 INFO L226 Difference]: Without dead ends: 52 [2021-05-02 21:52:06,118 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 243.5ms TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-05-02 21:52:06,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-02 21:52:06,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 42. [2021-05-02 21:52:06,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 31 states have internal predecessors, (33), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 21:52:06,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2021-05-02 21:52:06,121 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 34 [2021-05-02 21:52:06,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:52:06,121 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2021-05-02 21:52:06,121 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 21:52:06,122 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2021-05-02 21:52:06,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 21:52:06,123 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:52:06,123 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 21:52:06,324 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:52:06,325 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:52:06,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:52:06,325 INFO L82 PathProgramCache]: Analyzing trace with hash -782932132, now seen corresponding path program 2 times [2021-05-02 21:52:06,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:52:06,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597477240] [2021-05-02 21:52:06,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:52:06,331 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:52:06,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1293016082] [2021-05-02 21:52:06,331 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:52:06,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 21:52:06,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 21:52:06,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 21:52:06,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:52:06,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:06,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:06,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:06,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:06,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:06,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:06,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:06,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:06,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:06,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:06,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:06,467 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 21:52:06,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:52:06,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597477240] [2021-05-02 21:52:06,468 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:52:06,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293016082] [2021-05-02 21:52:06,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293016082] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 21:52:06,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 21:52:06,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 21:52:06,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110461802] [2021-05-02 21:52:06,468 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 21:52:06,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:52:06,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 21:52:06,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 21:52:06,469 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 21:52:06,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:52:06,501 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2021-05-02 21:52:06,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 21:52:06,501 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Word has length 38 [2021-05-02 21:52:06,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:52:06,502 INFO L225 Difference]: With dead ends: 47 [2021-05-02 21:52:06,502 INFO L226 Difference]: Without dead ends: 47 [2021-05-02 21:52:06,502 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 20.6ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-02 21:52:06,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-02 21:52:06,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-05-02 21:52:06,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 35 states have internal predecessors, (39), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 21:52:06,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2021-05-02 21:52:06,504 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 38 [2021-05-02 21:52:06,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:52:06,505 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2021-05-02 21:52:06,505 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 21:52:06,505 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2021-05-02 21:52:06,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 21:52:06,505 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:52:06,505 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 21:52:06,720 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:52:06,721 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:52:06,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:52:06,721 INFO L82 PathProgramCache]: Analyzing trace with hash -781829865, now seen corresponding path program 2 times [2021-05-02 21:52:06,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:52:06,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488755265] [2021-05-02 21:52:06,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:52:06,728 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:52:06,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1605844969] [2021-05-02 21:52:06,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:52:06,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 21:52:06,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 21:52:06,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 48 conjunts are in the unsatisfiable core [2021-05-02 21:52:06,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:52:06,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:06,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:06,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:06,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:06,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:06,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:12,944 WARN L205 SmtUtils]: Spent 4.02 s on a formula simplification that was a NOOP. DAG size: 22 [2021-05-02 21:52:20,996 WARN L205 SmtUtils]: Spent 6.03 s on a formula simplification that was a NOOP. DAG size: 25 [2021-05-02 21:52:33,163 WARN L205 SmtUtils]: Spent 12.07 s on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-05-02 21:52:41,271 WARN L205 SmtUtils]: Spent 8.07 s on a formula simplification. DAG size of input: 45 DAG size of output: 32 [2021-05-02 21:52:41,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:41,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:41,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:41,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:41,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:41,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:41,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:41,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:41,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:41,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:41,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:41,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:41,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:41,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:41,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:41,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:41,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:41,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:41,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:41,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:41,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:41,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:41,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:41,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:41,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:52:41,435 WARN L159 QuantifierPusher]: Ignoring assumption.