/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_unwindbound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 21:55:59,340 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 21:55:59,343 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 21:55:59,381 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 21:55:59,381 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 21:55:59,384 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 21:55:59,386 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 21:55:59,391 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 21:55:59,393 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 21:55:59,397 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 21:55:59,398 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 21:55:59,399 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 21:55:59,399 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 21:55:59,401 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 21:55:59,422 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 21:55:59,424 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 21:55:59,426 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 21:55:59,427 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 21:55:59,429 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 21:55:59,434 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 21:55:59,435 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 21:55:59,437 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 21:55:59,437 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 21:55:59,439 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 21:55:59,445 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 21:55:59,454 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 21:55:59,455 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 21:55:59,455 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 21:55:59,456 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 21:55:59,472 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 21:55:59,472 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 21:55:59,475 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 21:55:59,475 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 21:55:59,475 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 21:55:59,475 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 21:55:59,475 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 21:55:59,476 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 21:55:59,476 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 21:55:59,476 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 21:55:59,477 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 21:55:59,477 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 21:55:59,477 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 21:55:59,477 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 21:55:59,478 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 21:55:59,478 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 21:55:59,478 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 21:55:59,478 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 21:55:59,478 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 21:55:59,478 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 21:55:59,478 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 21:55:59,479 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 21:55:59,479 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 21:55:59,818 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 21:55:59,834 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 21:55:59,837 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 21:55:59,838 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 21:55:59,838 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 21:55:59,839 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_unwindbound5.c [2021-05-02 21:55:59,897 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2bb38f37/d3f9e91dfbdc42f2ae29891f899e3c1e/FLAG4e7c339f6 [2021-05-02 21:56:00,342 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 21:56:00,342 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_unwindbound5.c [2021-05-02 21:56:00,348 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2bb38f37/d3f9e91dfbdc42f2ae29891f899e3c1e/FLAG4e7c339f6 [2021-05-02 21:56:00,746 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2bb38f37/d3f9e91dfbdc42f2ae29891f899e3c1e [2021-05-02 21:56:00,748 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 21:56:00,749 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 21:56:00,763 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 21:56:00,763 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 21:56:00,766 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 21:56:00,767 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 09:56:00" (1/1) ... [2021-05-02 21:56:00,770 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37a96f8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:56:00, skipping insertion in model container [2021-05-02 21:56:00,771 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 09:56:00" (1/1) ... [2021-05-02 21:56:00,777 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 21:56:00,789 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 21:56:00,896 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_unwindbound5.c[537,550] [2021-05-02 21:56:00,912 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 21:56:00,919 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 21:56:00,929 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_unwindbound5.c[537,550] [2021-05-02 21:56:00,938 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 21:56:00,949 INFO L208 MainTranslator]: Completed translation [2021-05-02 21:56:00,949 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:56:00 WrapperNode [2021-05-02 21:56:00,949 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 21:56:00,950 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 21:56:00,950 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 21:56:00,951 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 21:56:01,000 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:56:00" (1/1) ... [2021-05-02 21:56:01,000 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:56:00" (1/1) ... [2021-05-02 21:56:01,005 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:56:00" (1/1) ... [2021-05-02 21:56:01,005 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:56:00" (1/1) ... [2021-05-02 21:56:01,009 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:56:00" (1/1) ... [2021-05-02 21:56:01,012 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:56:00" (1/1) ... [2021-05-02 21:56:01,013 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:56:00" (1/1) ... [2021-05-02 21:56:01,014 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 21:56:01,015 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 21:56:01,015 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 21:56:01,015 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 21:56:01,016 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:56:00" (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 21:56:01,075 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 21:56:01,076 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 21:56:01,076 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 21:56:01,076 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 21:56:01,076 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 21:56:01,076 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 21:56:01,076 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 21:56:01,077 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 21:56:01,077 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 21:56:01,077 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 21:56:01,077 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 21:56:01,078 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 21:56:01,078 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 21:56:01,078 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 21:56:01,078 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 21:56:01,079 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 21:56:01,079 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 21:56:01,079 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 21:56:01,080 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 21:56:01,080 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 21:56:01,347 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 21:56:01,348 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 21:56:01,349 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 09:56:01 BoogieIcfgContainer [2021-05-02 21:56:01,349 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 21:56:01,350 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 21:56:01,350 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 21:56:01,350 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 21:56:01,352 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 09:56:01" (1/1) ... [2021-05-02 21:56:01,366 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 09:56:01 BasicIcfg [2021-05-02 21:56:01,366 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 21:56:01,367 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 21:56:01,367 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 21:56:01,370 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 21:56:01,370 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 09:56:00" (1/4) ... [2021-05-02 21:56:01,370 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b69d4ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 09:56:01, skipping insertion in model container [2021-05-02 21:56:01,371 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:56:00" (2/4) ... [2021-05-02 21:56:01,371 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b69d4ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 09:56:01, skipping insertion in model container [2021-05-02 21:56:01,371 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 09:56:01" (3/4) ... [2021-05-02 21:56:01,371 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b69d4ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 09:56:01, skipping insertion in model container [2021-05-02 21:56:01,371 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 09:56:01" (4/4) ... [2021-05-02 21:56:01,372 INFO L111 eAbstractionObserver]: Analyzing ICFG prodbin-ll_unwindbound5.cJordan [2021-05-02 21:56:01,376 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 21:56:01,379 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 21:56:01,392 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 21:56:01,417 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 21:56:01,417 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 21:56:01,417 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 21:56:01,418 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 21:56:01,418 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 21:56:01,418 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 21:56:01,418 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 21:56:01,418 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 21:56:01,429 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 21:56:01,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 21:56:01,437 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:56:01,437 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 21:56:01,437 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:56:01,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:56:01,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1957529129, now seen corresponding path program 1 times [2021-05-02 21:56:01,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:56:01,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922389184] [2021-05-02 21:56:01,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:56:01,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:56:01,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 21:56:01,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:56:01,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 21:56:01,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:56:01,710 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 21:56:01,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:56:01,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922389184] [2021-05-02 21:56:01,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922389184] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 21:56:01,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 21:56:01,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 21:56:01,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336131094] [2021-05-02 21:56:01,716 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 21:56:01,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:56:01,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 21:56:01,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 21:56:01,728 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 21:56:01,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:56:01,791 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2021-05-02 21:56:01,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 21:56:01,792 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 21:56:01,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:56:01,800 INFO L225 Difference]: With dead ends: 31 [2021-05-02 21:56:01,800 INFO L226 Difference]: Without dead ends: 26 [2021-05-02 21:56:01,801 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 50.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 21:56:01,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-02 21:56:01,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-05-02 21:56:01,825 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 21:56:01,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-05-02 21:56:01,827 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 17 [2021-05-02 21:56:01,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:56:01,827 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-05-02 21:56:01,827 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 21:56:01,827 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-05-02 21:56:01,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 21:56:01,828 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:56:01,828 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 21:56:01,829 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 21:56:01,829 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:56:01,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:56:01,830 INFO L82 PathProgramCache]: Analyzing trace with hash 583261658, now seen corresponding path program 1 times [2021-05-02 21:56:01,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:56:01,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451335549] [2021-05-02 21:56:01,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:56:01,844 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:56:01,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1778987674] [2021-05-02 21:56:01,845 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 21:56:01,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:56:01,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 21:56:01,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:56:02,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:02,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:02,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:02,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:02,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:02,111 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 21:56:02,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:56:02,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451335549] [2021-05-02 21:56:02,112 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:56:02,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778987674] [2021-05-02 21:56:02,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778987674] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 21:56:02,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 21:56:02,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 21:56:02,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25881967] [2021-05-02 21:56:02,114 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 21:56:02,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:56:02,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 21:56:02,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 21:56:02,115 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 21:56:02,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:56:02,125 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2021-05-02 21:56:02,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 21:56:02,125 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 21:56:02,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:56:02,126 INFO L225 Difference]: With dead ends: 27 [2021-05-02 21:56:02,126 INFO L226 Difference]: Without dead ends: 27 [2021-05-02 21:56:02,126 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.6ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 21:56:02,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-02 21:56:02,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-02 21:56:02,129 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 21:56:02,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2021-05-02 21:56:02,130 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 18 [2021-05-02 21:56:02,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:56:02,130 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2021-05-02 21:56:02,130 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 21:56:02,130 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2021-05-02 21:56:02,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 21:56:02,131 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:56:02,131 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 21:56:02,349 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 21:56:02,350 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:56:02,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:56:02,351 INFO L82 PathProgramCache]: Analyzing trace with hash 584363925, now seen corresponding path program 1 times [2021-05-02 21:56:02,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:56:02,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711917629] [2021-05-02 21:56:02,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:56:02,369 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:56:02,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1326687260] [2021-05-02 21:56:02,369 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 21:56:02,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:56:02,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 21:56:02,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:56:02,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:02,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:02,514 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 21:56:02,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:56:02,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711917629] [2021-05-02 21:56:02,515 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:56:02,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326687260] [2021-05-02 21:56:02,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326687260] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 21:56:02,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 21:56:02,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 21:56:02,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958260890] [2021-05-02 21:56:02,516 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 21:56:02,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:56:02,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 21:56:02,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 21:56:02,517 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 21:56:02,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:56:02,611 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2021-05-02 21:56:02,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 21:56:02,612 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 21:56:02,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:56:02,613 INFO L225 Difference]: With dead ends: 35 [2021-05-02 21:56:02,613 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 21:56:02,613 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 48.0ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 21:56:02,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 21:56:02,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2021-05-02 21:56:02,617 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 21:56:02,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2021-05-02 21:56:02,618 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 18 [2021-05-02 21:56:02,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:56:02,618 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2021-05-02 21:56:02,618 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 21:56:02,619 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2021-05-02 21:56:02,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 21:56:02,619 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:56:02,620 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 21:56:02,842 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:56:02,843 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:56:02,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:56:02,843 INFO L82 PathProgramCache]: Analyzing trace with hash 919545147, now seen corresponding path program 1 times [2021-05-02 21:56:02,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:56:02,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790328487] [2021-05-02 21:56:02,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:56:02,857 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:56:02,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [285189204] [2021-05-02 21:56:02,858 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 21:56:02,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:56:02,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 21:56:02,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:56:02,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:02,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:02,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:02,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:03,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:03,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:03,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:03,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:03,041 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 21:56:03,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:56:03,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790328487] [2021-05-02 21:56:03,042 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:56:03,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285189204] [2021-05-02 21:56:03,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285189204] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 21:56:03,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 21:56:03,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 21:56:03,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507749424] [2021-05-02 21:56:03,043 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 21:56:03,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:56:03,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 21:56:03,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 21:56:03,044 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 21:56:03,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:56:03,081 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2021-05-02 21:56:03,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 21:56:03,082 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 21:56:03,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:56:03,083 INFO L225 Difference]: With dead ends: 37 [2021-05-02 21:56:03,083 INFO L226 Difference]: Without dead ends: 37 [2021-05-02 21:56:03,084 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 19.2ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 21:56:03,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-05-02 21:56:03,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-05-02 21:56:03,087 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 21:56:03,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2021-05-02 21:56:03,088 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 28 [2021-05-02 21:56:03,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:56:03,089 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2021-05-02 21:56:03,089 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 21:56:03,089 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2021-05-02 21:56:03,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 21:56:03,091 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:56:03,091 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 21:56:03,310 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:56:03,311 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:56:03,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:56:03,311 INFO L82 PathProgramCache]: Analyzing trace with hash 920647414, now seen corresponding path program 1 times [2021-05-02 21:56:03,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:56:03,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012758630] [2021-05-02 21:56:03,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:56:03,323 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:56:03,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2045327349] [2021-05-02 21:56:03,323 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 21:56:03,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:56:03,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-02 21:56:03,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:56:03,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:03,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:03,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:03,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:03,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:03,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:03,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:03,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:03,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:03,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:03,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:03,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:03,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:03,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:03,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:03,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:03,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:03,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:03,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:03,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:03,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:03,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:03,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:03,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:03,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:03,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:03,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:03,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:03,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:03,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:03,851 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 21:56:03,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:56:03,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012758630] [2021-05-02 21:56:03,851 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:56:03,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045327349] [2021-05-02 21:56:03,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045327349] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 21:56:03,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 21:56:03,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 21:56:03,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703209116] [2021-05-02 21:56:03,852 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 21:56:03,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:56:03,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 21:56:03,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-05-02 21:56:03,854 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 21:56:06,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:56:06,057 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2021-05-02 21:56:06,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 21:56:06,058 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 21:56:06,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:56:06,061 INFO L225 Difference]: With dead ends: 49 [2021-05-02 21:56:06,062 INFO L226 Difference]: Without dead ends: 49 [2021-05-02 21:56:06,062 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 142.2ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-05-02 21:56:06,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-02 21:56:06,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2021-05-02 21:56:06,073 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 21:56:06,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2021-05-02 21:56:06,074 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 28 [2021-05-02 21:56:06,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:56:06,074 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2021-05-02 21:56:06,074 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 21:56:06,074 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2021-05-02 21:56:06,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 21:56:06,075 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:56:06,075 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 21:56:06,292 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:56:06,293 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:56:06,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:56:06,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1631509547, now seen corresponding path program 1 times [2021-05-02 21:56:06,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:56:06,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087423447] [2021-05-02 21:56:06,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:56:06,308 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:56:06,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1165500059] [2021-05-02 21:56:06,308 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 21:56:06,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:56:06,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 21:56:06,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:56:06,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:06,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:06,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:06,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:06,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:06,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:06,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:06,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:06,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:06,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:06,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:06,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:06,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:06,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:06,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:06,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:06,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:06,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:06,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:06,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:06,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:06,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:06,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:06,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:06,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:06,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:06,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:06,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:06,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:06,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:06,659 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 21:56:06,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:56:06,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087423447] [2021-05-02 21:56:06,660 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:56:06,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165500059] [2021-05-02 21:56:06,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165500059] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 21:56:06,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 21:56:06,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 21:56:06,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088976823] [2021-05-02 21:56:06,661 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 21:56:06,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:56:06,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 21:56:06,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-02 21:56:06,661 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 21:56:06,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:56:06,792 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2021-05-02 21:56:06,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 21:56:06,793 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 21:56:06,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:56:06,795 INFO L225 Difference]: With dead ends: 53 [2021-05-02 21:56:06,795 INFO L226 Difference]: Without dead ends: 53 [2021-05-02 21:56:06,795 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 87.1ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-02 21:56:06,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-05-02 21:56:06,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2021-05-02 21:56:06,806 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 21:56:06,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2021-05-02 21:56:06,811 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 28 [2021-05-02 21:56:06,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:56:06,814 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2021-05-02 21:56:06,814 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 21:56:06,814 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2021-05-02 21:56:06,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 21:56:06,816 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:56:06,816 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 21:56:07,037 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:56:07,037 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:56:07,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:56:07,038 INFO L82 PathProgramCache]: Analyzing trace with hash -357510123, now seen corresponding path program 1 times [2021-05-02 21:56:07,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:56:07,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44342321] [2021-05-02 21:56:07,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:56:07,048 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:56:07,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [744596705] [2021-05-02 21:56:07,048 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 21:56:07,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:56:07,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 21:56:07,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:56:07,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:07,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:07,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:07,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:07,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:07,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:07,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:07,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:07,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:07,297 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 21:56:07,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:56:07,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44342321] [2021-05-02 21:56:07,297 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:56:07,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744596705] [2021-05-02 21:56:07,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744596705] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 21:56:07,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 21:56:07,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 21:56:07,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958769426] [2021-05-02 21:56:07,298 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 21:56:07,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:56:07,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 21:56:07,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-05-02 21:56:07,299 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 21:56:09,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:56:09,515 INFO L93 Difference]: Finished difference Result 57 states and 60 transitions. [2021-05-02 21:56:09,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 21:56:09,516 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 21:56:09,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:56:09,517 INFO L225 Difference]: With dead ends: 57 [2021-05-02 21:56:09,517 INFO L226 Difference]: Without dead ends: 52 [2021-05-02 21:56:09,518 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 234.0ms TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-05-02 21:56:09,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-02 21:56:09,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 42. [2021-05-02 21:56:09,521 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 21:56:09,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2021-05-02 21:56:09,522 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 34 [2021-05-02 21:56:09,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:56:09,522 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2021-05-02 21:56:09,522 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 21:56:09,522 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2021-05-02 21:56:09,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 21:56:09,523 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:56:09,523 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 21:56:09,724 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:56:09,725 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:56:09,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:56:09,725 INFO L82 PathProgramCache]: Analyzing trace with hash -782932132, now seen corresponding path program 2 times [2021-05-02 21:56:09,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:56:09,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916582158] [2021-05-02 21:56:09,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:56:09,738 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:56:09,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1965936903] [2021-05-02 21:56:09,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:56:09,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 21:56:09,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 21:56:09,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 21:56:09,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:56:09,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:09,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:09,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:09,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:09,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:09,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:09,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:09,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:09,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:09,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:09,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:09,901 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 21:56:09,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:56:09,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916582158] [2021-05-02 21:56:09,902 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:56:09,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965936903] [2021-05-02 21:56:09,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965936903] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 21:56:09,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 21:56:09,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 21:56:09,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107402772] [2021-05-02 21:56:09,903 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 21:56:09,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:56:09,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 21:56:09,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 21:56:09,905 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 21:56:09,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:56:09,947 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2021-05-02 21:56:09,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 21:56:09,948 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 21:56:09,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:56:09,949 INFO L225 Difference]: With dead ends: 47 [2021-05-02 21:56:09,949 INFO L226 Difference]: Without dead ends: 47 [2021-05-02 21:56:09,949 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 27.0ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-02 21:56:09,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-02 21:56:09,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-05-02 21:56:09,952 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 21:56:09,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2021-05-02 21:56:09,952 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 38 [2021-05-02 21:56:09,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:56:09,953 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2021-05-02 21:56:09,953 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 21:56:09,953 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2021-05-02 21:56:09,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 21:56:09,953 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:56:09,953 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 21:56:10,168 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:56:10,169 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:56:10,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:56:10,169 INFO L82 PathProgramCache]: Analyzing trace with hash -781829865, now seen corresponding path program 2 times [2021-05-02 21:56:10,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:56:10,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642449430] [2021-05-02 21:56:10,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:56:10,176 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:56:10,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1840540634] [2021-05-02 21:56:10,176 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 21:56:10,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 21:56:10,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 21:56:10,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 48 conjunts are in the unsatisfiable core [2021-05-02 21:56:10,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:56:10,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:10,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:10,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:10,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:10,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:10,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:16,519 WARN L205 SmtUtils]: Spent 4.07 s on a formula simplification that was a NOOP. DAG size: 22 [2021-05-02 21:56:22,824 WARN L205 SmtUtils]: Spent 6.04 s on a formula simplification that was a NOOP. DAG size: 25 [2021-05-02 21:56:34,953 WARN L205 SmtUtils]: Spent 12.10 s on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-05-02 21:56:43,105 WARN L205 SmtUtils]: Spent 8.10 s on a formula simplification. DAG size of input: 45 DAG size of output: 32 [2021-05-02 21:56:43,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:43,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:43,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:43,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:43,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:43,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:43,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:43,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:43,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:43,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:43,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:43,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:43,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:43,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:43,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:43,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:43,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:43,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:43,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:43,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:43,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:43,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:43,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:43,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:43,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:43,341 WARN L159 QuantifierPusher]: Ignoring assumption.