/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/hard-ll_unwindbound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 08:49:52,737 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 08:49:52,738 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 08:49:52,756 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 08:49:52,756 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 08:49:52,757 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 08:49:52,758 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 08:49:52,759 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 08:49:52,760 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 08:49:52,760 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 08:49:52,761 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 08:49:52,762 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 08:49:52,762 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 08:49:52,762 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 08:49:52,763 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 08:49:52,763 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 08:49:52,764 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 08:49:52,764 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 08:49:52,765 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 08:49:52,766 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 08:49:52,767 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 08:49:52,770 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 08:49:52,770 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 08:49:52,771 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 08:49:52,772 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 08:49:52,777 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 08:49:52,777 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 08:49:52,778 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 08:49:52,786 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 08:49:52,797 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 08:49:52,797 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 08:49:52,799 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 08:49:52,799 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 08:49:52,799 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 08:49:52,800 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 08:49:52,800 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 08:49:52,800 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 08:49:52,800 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 08:49:52,800 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 08:49:52,801 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 08:49:52,801 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 08:49:52,801 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 08:49:52,801 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 08:49:52,801 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 08:49:52,801 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 08:49:52,802 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 08:49:52,802 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 08:49:52,802 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 08:49:52,802 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 08:49:52,802 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 08:49:52,803 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 08:49:52,803 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 08:49:53,040 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 08:49:53,068 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 08:49:53,070 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 08:49:53,071 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 08:49:53,071 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 08:49:53,072 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-ll_unwindbound5.c [2021-05-06 08:49:53,120 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc4f24e2c/b588b83318c74677a38324d8065f1b92/FLAGe61c2e48e [2021-05-06 08:49:53,469 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 08:49:53,469 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_unwindbound5.c [2021-05-06 08:49:53,474 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc4f24e2c/b588b83318c74677a38324d8065f1b92/FLAGe61c2e48e [2021-05-06 08:49:53,488 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc4f24e2c/b588b83318c74677a38324d8065f1b92 [2021-05-06 08:49:53,491 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 08:49:53,493 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 08:49:53,495 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 08:49:53,495 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 08:49:53,498 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 08:49:53,499 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:49:53" (1/1) ... [2021-05-06 08:49:53,500 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@251f3713 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:49:53, skipping insertion in model container [2021-05-06 08:49:53,500 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:49:53" (1/1) ... [2021-05-06 08:49:53,505 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 08:49:53,515 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 08:49:53,595 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_unwindbound5.c[546,559] [2021-05-06 08:49:53,604 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:49:53,609 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 08:49:53,626 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_unwindbound5.c[546,559] [2021-05-06 08:49:53,654 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:49:53,665 INFO L208 MainTranslator]: Completed translation [2021-05-06 08:49:53,666 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:49:53 WrapperNode [2021-05-06 08:49:53,666 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 08:49:53,668 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 08:49:53,671 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 08:49:53,671 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 08:49:53,679 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:49:53" (1/1) ... [2021-05-06 08:49:53,679 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:49:53" (1/1) ... [2021-05-06 08:49:53,692 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:49:53" (1/1) ... [2021-05-06 08:49:53,692 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:49:53" (1/1) ... [2021-05-06 08:49:53,702 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:49:53" (1/1) ... [2021-05-06 08:49:53,705 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:49:53" (1/1) ... [2021-05-06 08:49:53,706 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:49:53" (1/1) ... [2021-05-06 08:49:53,707 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 08:49:53,708 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 08:49:53,708 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 08:49:53,708 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 08:49:53,708 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:49:53" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 08:49:53,770 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 08:49:53,770 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 08:49:53,770 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 08:49:53,770 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 08:49:53,770 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 08:49:53,770 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 08:49:53,770 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 08:49:53,771 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 08:49:53,771 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 08:49:53,771 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 08:49:53,771 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-06 08:49:53,771 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 08:49:53,772 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 08:49:53,772 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 08:49:53,772 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 08:49:53,772 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 08:49:53,772 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 08:49:53,772 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 08:49:53,773 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 08:49:53,773 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 08:49:54,005 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 08:49:54,005 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 08:49:54,006 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:49:54 BoogieIcfgContainer [2021-05-06 08:49:54,006 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 08:49:54,006 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 08:49:54,006 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 08:49:54,007 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 08:49:54,009 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:49:54" (1/1) ... [2021-05-06 08:49:54,030 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:49:54 BasicIcfg [2021-05-06 08:49:54,031 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 08:49:54,032 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 08:49:54,032 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 08:49:54,034 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 08:49:54,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 08:49:53" (1/4) ... [2021-05-06 08:49:54,034 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e85bda7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:49:54, skipping insertion in model container [2021-05-06 08:49:54,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:49:53" (2/4) ... [2021-05-06 08:49:54,035 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e85bda7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:49:54, skipping insertion in model container [2021-05-06 08:49:54,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:49:54" (3/4) ... [2021-05-06 08:49:54,035 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e85bda7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 08:49:54, skipping insertion in model container [2021-05-06 08:49:54,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:49:54" (4/4) ... [2021-05-06 08:49:54,036 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-ll_unwindbound5.cJordan [2021-05-06 08:49:54,042 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 08:49:54,045 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 08:49:54,056 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 08:49:54,075 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 08:49:54,075 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 08:49:54,075 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 08:49:54,075 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 08:49:54,076 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 08:49:54,076 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 08:49:54,076 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 08:49:54,076 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 08:49:54,089 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 08:49:54,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 08:49:54,095 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:49:54,095 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:49:54,096 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:49:54,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:49:54,100 INFO L82 PathProgramCache]: Analyzing trace with hash 79654685, now seen corresponding path program 1 times [2021-05-06 08:49:54,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:49:54,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270562103] [2021-05-06 08:49:54,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:49:54,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:49:54,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 08:49:54,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:49:54,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 08:49:54,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:49:54,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 08:49:54,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:49:54,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270562103] [2021-05-06 08:49:54,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270562103] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:49:54,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:49:54,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 08:49:54,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260563172] [2021-05-06 08:49:54,345 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 08:49:54,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:49:54,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 08:49:54,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:49:54,355 INFO L87 Difference]: Start difference. First operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 08:49:54,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:49:54,466 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2021-05-06 08:49:54,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 08:49:54,467 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-06 08:49:54,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:49:54,472 INFO L225 Difference]: With dead ends: 38 [2021-05-06 08:49:54,472 INFO L226 Difference]: Without dead ends: 33 [2021-05-06 08:49:54,473 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 59.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:49:54,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-06 08:49:54,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2021-05-06 08:49:54,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 08:49:54,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2021-05-06 08:49:54,496 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 18 [2021-05-06 08:49:54,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:49:54,496 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2021-05-06 08:49:54,496 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 08:49:54,496 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2021-05-06 08:49:54,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 08:49:54,497 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:49:54,497 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:49:54,497 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 08:49:54,497 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:49:54,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:49:54,498 INFO L82 PathProgramCache]: Analyzing trace with hash -85369733, now seen corresponding path program 1 times [2021-05-06 08:49:54,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:49:54,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453566645] [2021-05-06 08:49:54,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:49:54,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:49:54,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 08:49:54,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:49:54,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 08:49:54,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:49:54,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 08:49:54,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:49:54,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453566645] [2021-05-06 08:49:54,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453566645] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:49:54,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:49:54,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 08:49:54,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476550469] [2021-05-06 08:49:54,576 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:49:54,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:49:54,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:49:54,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:49:54,576 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (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) [2021-05-06 08:49:54,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:49:54,757 INFO L93 Difference]: Finished difference Result 45 states and 60 transitions. [2021-05-06 08:49:54,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:49:54,757 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (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 18 [2021-05-06 08:49:54,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:49:54,758 INFO L225 Difference]: With dead ends: 45 [2021-05-06 08:49:54,758 INFO L226 Difference]: Without dead ends: 45 [2021-05-06 08:49:54,759 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 107.2ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:49:54,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-06 08:49:54,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2021-05-06 08:49:54,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 22 states have internal predecessors, (27), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 08:49:54,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2021-05-06 08:49:54,765 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 18 [2021-05-06 08:49:54,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:49:54,766 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2021-05-06 08:49:54,766 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (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) [2021-05-06 08:49:54,766 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2021-05-06 08:49:54,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-06 08:49:54,767 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:49:54,767 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:49:54,767 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 08:49:54,767 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:49:54,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:49:54,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1527809342, now seen corresponding path program 1 times [2021-05-06 08:49:54,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:49:54,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883704604] [2021-05-06 08:49:54,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:49:54,778 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:49:54,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [268500366] [2021-05-06 08:49:54,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:49:54,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:49:54,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 08:49:54,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:49:54,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:54,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:54,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:54,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:54,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:54,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 08:49:54,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:49:54,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883704604] [2021-05-06 08:49:54,973 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:49:54,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268500366] [2021-05-06 08:49:54,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268500366] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:49:54,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:49:54,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 08:49:54,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504724353] [2021-05-06 08:49:54,974 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 08:49:54,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:49:54,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 08:49:54,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 08:49:54,975 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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) [2021-05-06 08:49:54,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:49:54,983 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2021-05-06 08:49:54,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 08:49:54,983 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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 20 [2021-05-06 08:49:54,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:49:54,984 INFO L225 Difference]: With dead ends: 38 [2021-05-06 08:49:54,984 INFO L226 Difference]: Without dead ends: 38 [2021-05-06 08:49:54,984 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 08:49:54,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-06 08:49:54,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-05-06 08:49:54,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 08:49:54,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2021-05-06 08:49:54,989 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 20 [2021-05-06 08:49:54,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:49:54,989 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2021-05-06 08:49:54,989 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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) [2021-05-06 08:49:54,989 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2021-05-06 08:49:54,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 08:49:54,990 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:49:54,990 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:49:55,205 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-06 08:49:55,205 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:49:55,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:49:55,206 INFO L82 PathProgramCache]: Analyzing trace with hash 2128444854, now seen corresponding path program 1 times [2021-05-06 08:49:55,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:49:55,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622491124] [2021-05-06 08:49:55,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:49:55,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:49:55,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 08:49:55,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:49:55,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 08:49:55,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:49:55,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-05-06 08:49:55,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:49:55,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 08:49:55,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:49:55,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622491124] [2021-05-06 08:49:55,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622491124] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:49:55,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:49:55,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 08:49:55,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93276458] [2021-05-06 08:49:55,330 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:49:55,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:49:55,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:49:55,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:49:55,331 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:49:55,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:49:55,544 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2021-05-06 08:49:55,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:49:55,545 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-06 08:49:55,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:49:55,548 INFO L225 Difference]: With dead ends: 50 [2021-05-06 08:49:55,548 INFO L226 Difference]: Without dead ends: 50 [2021-05-06 08:49:55,549 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 119.2ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:49:55,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-06 08:49:55,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2021-05-06 08:49:55,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 27 states have internal predecessors, (32), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 08:49:55,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2021-05-06 08:49:55,562 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 23 [2021-05-06 08:49:55,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:49:55,563 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2021-05-06 08:49:55,563 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:49:55,563 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2021-05-06 08:49:55,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 08:49:55,564 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:49:55,564 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:49:55,564 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-06 08:49:55,564 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:49:55,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:49:55,565 INFO L82 PathProgramCache]: Analyzing trace with hash 135546551, now seen corresponding path program 1 times [2021-05-06 08:49:55,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:49:55,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246140682] [2021-05-06 08:49:55,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:49:55,591 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:49:55,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [840329944] [2021-05-06 08:49:55,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:49:55,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:49:55,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:49:55,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:49:55,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:55,716 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:49:55,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:49:55,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246140682] [2021-05-06 08:49:55,716 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:49:55,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840329944] [2021-05-06 08:49:55,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840329944] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:49:55,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:49:55,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:49:55,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961681334] [2021-05-06 08:49:55,717 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:49:55,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:49:55,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:49:55,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:49:55,718 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 08:49:55,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:49:55,764 INFO L93 Difference]: Finished difference Result 57 states and 72 transitions. [2021-05-06 08:49:55,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:49:55,765 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2021-05-06 08:49:55,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:49:55,766 INFO L225 Difference]: With dead ends: 57 [2021-05-06 08:49:55,766 INFO L226 Difference]: Without dead ends: 56 [2021-05-06 08:49:55,766 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.6ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:49:55,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-06 08:49:55,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-05-06 08:49:55,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 35 states have internal predecessors, (41), 16 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 08:49:55,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2021-05-06 08:49:55,770 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 28 [2021-05-06 08:49:55,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:49:55,770 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2021-05-06 08:49:55,770 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 08:49:55,770 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2021-05-06 08:49:55,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-06 08:49:55,771 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:49:55,771 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:49:55,975 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:49:55,975 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:49:55,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:49:55,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1016025214, now seen corresponding path program 1 times [2021-05-06 08:49:55,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:49:55,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622426176] [2021-05-06 08:49:55,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:49:55,995 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:49:55,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1209251279] [2021-05-06 08:49:55,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:49:56,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:49:56,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:49:56,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:49:56,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:56,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:56,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:56,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:56,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:56,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:56,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:56,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:56,153 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 08:49:56,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:49:56,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622426176] [2021-05-06 08:49:56,154 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:49:56,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209251279] [2021-05-06 08:49:56,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209251279] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:49:56,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:49:56,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:49:56,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681701633] [2021-05-06 08:49:56,155 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:49:56,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:49:56,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:49:56,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:49:56,156 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 08:49:56,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:49:56,182 INFO L93 Difference]: Finished difference Result 69 states and 79 transitions. [2021-05-06 08:49:56,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:49:56,182 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 36 [2021-05-06 08:49:56,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:49:56,183 INFO L225 Difference]: With dead ends: 69 [2021-05-06 08:49:56,183 INFO L226 Difference]: Without dead ends: 69 [2021-05-06 08:49:56,183 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 6.5ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:49:56,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-06 08:49:56,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2021-05-06 08:49:56,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 44 states have internal predecessors, (49), 16 states have call successors, (16), 10 states have call predecessors, (16), 9 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 08:49:56,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 78 transitions. [2021-05-06 08:49:56,187 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 78 transitions. Word has length 36 [2021-05-06 08:49:56,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:49:56,188 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 78 transitions. [2021-05-06 08:49:56,188 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 08:49:56,188 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 78 transitions. [2021-05-06 08:49:56,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-06 08:49:56,188 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:49:56,188 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:49:56,391 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:49:56,391 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:49:56,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:49:56,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1017127481, now seen corresponding path program 1 times [2021-05-06 08:49:56,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:49:56,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93297898] [2021-05-06 08:49:56,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:49:56,399 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:49:56,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1875091900] [2021-05-06 08:49:56,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:49:56,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:49:56,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 08:49:56,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:49:56,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:56,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:56,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:56,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:56,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:56,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:56,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:56,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:56,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:56,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:56,610 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 08:49:56,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:49:56,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93297898] [2021-05-06 08:49:56,610 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:49:56,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875091900] [2021-05-06 08:49:56,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875091900] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:49:56,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:49:56,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 08:49:56,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557343742] [2021-05-06 08:49:56,611 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:49:56,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:49:56,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:49:56,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:49:56,611 INFO L87 Difference]: Start difference. First operand 68 states and 78 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:49:56,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:49:56,676 INFO L93 Difference]: Finished difference Result 72 states and 81 transitions. [2021-05-06 08:49:56,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:49:56,676 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2021-05-06 08:49:56,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:49:56,677 INFO L225 Difference]: With dead ends: 72 [2021-05-06 08:49:56,677 INFO L226 Difference]: Without dead ends: 58 [2021-05-06 08:49:56,677 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 32.6ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:49:56,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-06 08:49:56,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-05-06 08:49:56,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 37 states have internal predecessors, (42), 13 states have call successors, (13), 9 states have call predecessors, (13), 8 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 08:49:56,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2021-05-06 08:49:56,681 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 36 [2021-05-06 08:49:56,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:49:56,681 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2021-05-06 08:49:56,682 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:49:56,682 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2021-05-06 08:49:56,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-06 08:49:56,682 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:49:56,682 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:49:56,893 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:49:56,893 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:49:56,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:49:56,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1880362404, now seen corresponding path program 1 times [2021-05-06 08:49:56,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:49:56,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609721981] [2021-05-06 08:49:56,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:49:56,900 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:49:56,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2079362025] [2021-05-06 08:49:56,900 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 [2021-05-06 08:49:56,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:49:56,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:49:56,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:49:56,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:56,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:56,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:56,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:56,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:56,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:57,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:57,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:57,025 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 08:49:57,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:49:57,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609721981] [2021-05-06 08:49:57,025 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:49:57,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079362025] [2021-05-06 08:49:57,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079362025] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:49:57,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:49:57,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-06 08:49:57,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078746789] [2021-05-06 08:49:57,026 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:49:57,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:49:57,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:49:57,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:49:57,026 INFO L87 Difference]: Start difference. First operand 58 states and 66 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, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 08:49:57,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:49:57,074 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2021-05-06 08:49:57,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:49:57,074 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, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 38 [2021-05-06 08:49:57,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:49:57,075 INFO L225 Difference]: With dead ends: 60 [2021-05-06 08:49:57,075 INFO L226 Difference]: Without dead ends: 60 [2021-05-06 08:49:57,075 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 31.5ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:49:57,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-06 08:49:57,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-05-06 08:49:57,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 39 states have internal predecessors, (44), 13 states have call successors, (13), 9 states have call predecessors, (13), 8 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 08:49:57,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2021-05-06 08:49:57,079 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 38 [2021-05-06 08:49:57,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:49:57,079 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2021-05-06 08:49:57,079 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, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 08:49:57,079 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2021-05-06 08:49:57,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-06 08:49:57,080 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:49:57,080 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:49:57,288 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:49:57,289 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:49:57,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:49:57,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1525733273, now seen corresponding path program 1 times [2021-05-06 08:49:57,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:49:57,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241652929] [2021-05-06 08:49:57,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:49:57,295 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:49:57,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1150340120] [2021-05-06 08:49:57,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:49:57,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:49:57,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 08:49:57,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:49:57,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:57,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:57,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:57,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:57,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:57,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:57,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:57,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:57,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:57,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:57,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:57,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:57,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:57,526 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-06 08:49:57,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:49:57,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241652929] [2021-05-06 08:49:57,526 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:49:57,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150340120] [2021-05-06 08:49:57,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150340120] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:49:57,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:49:57,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:49:57,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114915648] [2021-05-06 08:49:57,528 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:49:57,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:49:57,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:49:57,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:49:57,529 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 08:49:57,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:49:57,658 INFO L93 Difference]: Finished difference Result 83 states and 103 transitions. [2021-05-06 08:49:57,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:49:57,658 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2021-05-06 08:49:57,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:49:57,659 INFO L225 Difference]: With dead ends: 83 [2021-05-06 08:49:57,659 INFO L226 Difference]: Without dead ends: 82 [2021-05-06 08:49:57,659 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 44.6ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:49:57,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-05-06 08:49:57,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 80. [2021-05-06 08:49:57,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 49 states have (on average 1.2040816326530612) internal successors, (59), 51 states have internal predecessors, (59), 21 states have call successors, (21), 10 states have call predecessors, (21), 9 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-06 08:49:57,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 98 transitions. [2021-05-06 08:49:57,663 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 98 transitions. Word has length 46 [2021-05-06 08:49:57,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:49:57,663 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 98 transitions. [2021-05-06 08:49:57,663 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 08:49:57,664 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 98 transitions. [2021-05-06 08:49:57,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-06 08:49:57,664 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:49:57,664 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:49:57,883 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:49:57,883 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:49:57,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:49:57,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1447419744, now seen corresponding path program 1 times [2021-05-06 08:49:57,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:49:57,884 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29595477] [2021-05-06 08:49:57,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:49:57,890 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:49:57,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1775450174] [2021-05-06 08:49:57,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:49:57,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:49:57,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 08:49:57,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:49:57,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:57,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:57,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:57,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:57,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:57,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:58,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:58,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:58,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:58,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:58,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:58,062 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 42 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 08:49:58,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:49:58,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29595477] [2021-05-06 08:49:58,062 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:49:58,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775450174] [2021-05-06 08:49:58,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775450174] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:49:58,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:49:58,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 08:49:58,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074885345] [2021-05-06 08:49:58,063 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:49:58,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:49:58,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:49:58,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:49:58,063 INFO L87 Difference]: Start difference. First operand 80 states and 98 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-06 08:49:58,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:49:58,096 INFO L93 Difference]: Finished difference Result 93 states and 107 transitions. [2021-05-06 08:49:58,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:49:58,096 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 54 [2021-05-06 08:49:58,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:49:58,097 INFO L225 Difference]: With dead ends: 93 [2021-05-06 08:49:58,097 INFO L226 Difference]: Without dead ends: 93 [2021-05-06 08:49:58,097 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 9.8ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:49:58,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-05-06 08:49:58,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2021-05-06 08:49:58,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 58 states have (on average 1.1551724137931034) internal successors, (67), 60 states have internal predecessors, (67), 21 states have call successors, (21), 13 states have call predecessors, (21), 12 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-06 08:49:58,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 106 transitions. [2021-05-06 08:49:58,102 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 106 transitions. Word has length 54 [2021-05-06 08:49:58,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:49:58,102 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 106 transitions. [2021-05-06 08:49:58,103 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-06 08:49:58,103 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 106 transitions. [2021-05-06 08:49:58,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-06 08:49:58,103 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:49:58,103 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:49:58,308 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-06 08:49:58,309 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:49:58,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:49:58,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1448522011, now seen corresponding path program 1 times [2021-05-06 08:49:58,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:49:58,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764750938] [2021-05-06 08:49:58,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:49:58,315 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:49:58,315 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1228061612] [2021-05-06 08:49:58,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:49:58,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:49:58,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 08:49:58,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:49:58,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:58,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:58,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:58,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:58,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:58,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:58,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:58,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:58,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:58,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:58,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:58,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:58,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:58,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:58,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:58,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:58,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:58,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:58,605 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-06 08:49:58,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:49:58,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764750938] [2021-05-06 08:49:58,606 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:49:58,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228061612] [2021-05-06 08:49:58,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228061612] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:49:58,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:49:58,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:49:58,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681382504] [2021-05-06 08:49:58,606 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 08:49:58,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:49:58,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 08:49:58,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:49:58,608 INFO L87 Difference]: Start difference. First operand 92 states and 106 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 08:49:58,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:49:58,736 INFO L93 Difference]: Finished difference Result 102 states and 118 transitions. [2021-05-06 08:49:58,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:49:58,736 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 54 [2021-05-06 08:49:58,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:49:58,737 INFO L225 Difference]: With dead ends: 102 [2021-05-06 08:49:58,737 INFO L226 Difference]: Without dead ends: 96 [2021-05-06 08:49:58,737 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 79.6ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:49:58,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-05-06 08:49:58,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2021-05-06 08:49:58,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 61 states have (on average 1.1311475409836065) internal successors, (69), 63 states have internal predecessors, (69), 21 states have call successors, (21), 14 states have call predecessors, (21), 13 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-06 08:49:58,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 108 transitions. [2021-05-06 08:49:58,741 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 108 transitions. Word has length 54 [2021-05-06 08:49:58,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:49:58,741 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 108 transitions. [2021-05-06 08:49:58,741 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 08:49:58,742 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 108 transitions. [2021-05-06 08:49:58,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-06 08:49:58,742 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:49:58,742 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 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, 1, 1] [2021-05-06 08:49:58,963 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-06 08:49:58,963 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:49:58,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:49:58,964 INFO L82 PathProgramCache]: Analyzing trace with hash -161321978, now seen corresponding path program 2 times [2021-05-06 08:49:58,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:49:58,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541902811] [2021-05-06 08:49:58,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:49:58,970 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:49:58,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1331455612] [2021-05-06 08:49:58,970 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:49:59,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-05-06 08:49:59,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:49:59,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:49:59,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:49:59,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:59,089 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-05-06 08:49:59,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:49:59,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541902811] [2021-05-06 08:49:59,090 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:49:59,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331455612] [2021-05-06 08:49:59,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331455612] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:49:59,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:49:59,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:49:59,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094810160] [2021-05-06 08:49:59,090 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:49:59,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:49:59,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:49:59,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:49:59,091 INFO L87 Difference]: Start difference. First operand 96 states and 108 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:49:59,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:49:59,140 INFO L93 Difference]: Finished difference Result 108 states and 125 transitions. [2021-05-06 08:49:59,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:49:59,140 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 56 [2021-05-06 08:49:59,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:49:59,141 INFO L225 Difference]: With dead ends: 108 [2021-05-06 08:49:59,141 INFO L226 Difference]: Without dead ends: 108 [2021-05-06 08:49:59,141 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.5ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:49:59,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-05-06 08:49:59,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2021-05-06 08:49:59,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 68 states have (on average 1.161764705882353) internal successors, (79), 71 states have internal predecessors, (79), 24 states have call successors, (24), 15 states have call predecessors, (24), 14 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 08:49:59,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 124 transitions. [2021-05-06 08:49:59,145 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 124 transitions. Word has length 56 [2021-05-06 08:49:59,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:49:59,145 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 124 transitions. [2021-05-06 08:49:59,145 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:49:59,145 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 124 transitions. [2021-05-06 08:49:59,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-06 08:49:59,146 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:49:59,146 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 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, 1, 1, 1, 1] [2021-05-06 08:49:59,356 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:49:59,356 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:49:59,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:49:59,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1294763379, now seen corresponding path program 1 times [2021-05-06 08:49:59,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:49:59,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994249575] [2021-05-06 08:49:59,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:49:59,362 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:49:59,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [183520284] [2021-05-06 08:49:59,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:49:59,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:49:59,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 08:49:59,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:49:59,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:59,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:59,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:59,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:59,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:59,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:59,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:59,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:59,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:59,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:59,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:59,500 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 36 proven. 46 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-05-06 08:49:59,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:49:59,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994249575] [2021-05-06 08:49:59,501 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:49:59,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183520284] [2021-05-06 08:49:59,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183520284] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:49:59,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:49:59,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 08:49:59,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150852231] [2021-05-06 08:49:59,501 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:49:59,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:49:59,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:49:59,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:49:59,502 INFO L87 Difference]: Start difference. First operand 107 states and 124 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, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-06 08:49:59,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:49:59,541 INFO L93 Difference]: Finished difference Result 109 states and 126 transitions. [2021-05-06 08:49:59,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:49:59,541 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, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) Word has length 61 [2021-05-06 08:49:59,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:49:59,543 INFO L225 Difference]: With dead ends: 109 [2021-05-06 08:49:59,543 INFO L226 Difference]: Without dead ends: 109 [2021-05-06 08:49:59,543 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 17.7ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:49:59,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-05-06 08:49:59,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2021-05-06 08:49:59,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 70 states have (on average 1.1571428571428573) internal successors, (81), 73 states have internal predecessors, (81), 24 states have call successors, (24), 15 states have call predecessors, (24), 14 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 08:49:59,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 126 transitions. [2021-05-06 08:49:59,546 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 126 transitions. Word has length 61 [2021-05-06 08:49:59,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:49:59,547 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 126 transitions. [2021-05-06 08:49:59,547 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, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-06 08:49:59,547 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 126 transitions. [2021-05-06 08:49:59,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-06 08:49:59,547 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:49:59,547 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:49:59,761 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:49:59,761 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:49:59,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:49:59,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1774996485, now seen corresponding path program 2 times [2021-05-06 08:49:59,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:49:59,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163533583] [2021-05-06 08:49:59,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:49:59,766 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:49:59,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [599105850] [2021-05-06 08:49:59,767 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:49:59,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:49:59,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:49:59,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 08:49:59,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:49:59,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:49:59,949 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-05-06 08:49:59,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:49:59,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163533583] [2021-05-06 08:49:59,949 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:49:59,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599105850] [2021-05-06 08:49:59,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599105850] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:49:59,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:49:59,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:49:59,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526070196] [2021-05-06 08:49:59,951 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 08:49:59,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:49:59,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 08:49:59,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:49:59,951 INFO L87 Difference]: Start difference. First operand 109 states and 126 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 08:50:00,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:50:00,068 INFO L93 Difference]: Finished difference Result 153 states and 196 transitions. [2021-05-06 08:50:00,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 08:50:00,068 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 64 [2021-05-06 08:50:00,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:50:00,070 INFO L225 Difference]: With dead ends: 153 [2021-05-06 08:50:00,070 INFO L226 Difference]: Without dead ends: 146 [2021-05-06 08:50:00,070 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.8ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:50:00,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-05-06 08:50:00,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 139. [2021-05-06 08:50:00,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 88 states have (on average 1.2045454545454546) internal successors, (106), 92 states have internal predecessors, (106), 35 states have call successors, (35), 16 states have call predecessors, (35), 15 states have return successors, (32), 30 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-06 08:50:00,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 173 transitions. [2021-05-06 08:50:00,078 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 173 transitions. Word has length 64 [2021-05-06 08:50:00,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:50:00,078 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 173 transitions. [2021-05-06 08:50:00,078 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 08:50:00,079 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 173 transitions. [2021-05-06 08:50:00,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-06 08:50:00,079 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:50:00,079 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:50:00,297 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-06 08:50:00,297 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:50:00,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:50:00,297 INFO L82 PathProgramCache]: Analyzing trace with hash 112143503, now seen corresponding path program 1 times [2021-05-06 08:50:00,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:50:00,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438287618] [2021-05-06 08:50:00,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:50:00,307 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:50:00,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1184872227] [2021-05-06 08:50:00,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:50:00,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:50:00,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 08:50:00,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:50:00,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:00,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:00,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:00,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:00,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:00,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:00,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:00,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:00,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:00,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:00,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:00,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:00,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:00,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:00,460 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 16 proven. 92 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-06 08:50:00,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:50:00,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438287618] [2021-05-06 08:50:00,460 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:50:00,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184872227] [2021-05-06 08:50:00,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184872227] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:50:00,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:50:00,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:50:00,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658302711] [2021-05-06 08:50:00,461 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 08:50:00,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:50:00,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 08:50:00,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:50:00,461 INFO L87 Difference]: Start difference. First operand 139 states and 173 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 6 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2021-05-06 08:50:00,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:50:00,519 INFO L93 Difference]: Finished difference Result 156 states and 184 transitions. [2021-05-06 08:50:00,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:50:00,525 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 6 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) Word has length 68 [2021-05-06 08:50:00,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:50:00,525 INFO L225 Difference]: With dead ends: 156 [2021-05-06 08:50:00,526 INFO L226 Difference]: Without dead ends: 156 [2021-05-06 08:50:00,527 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 17.1ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:50:00,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-05-06 08:50:00,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 155. [2021-05-06 08:50:00,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 100 states have (on average 1.16) internal successors, (116), 104 states have internal predecessors, (116), 35 states have call successors, (35), 20 states have call predecessors, (35), 19 states have return successors, (32), 30 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-06 08:50:00,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 183 transitions. [2021-05-06 08:50:00,533 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 183 transitions. Word has length 68 [2021-05-06 08:50:00,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:50:00,533 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 183 transitions. [2021-05-06 08:50:00,533 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 6 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2021-05-06 08:50:00,533 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 183 transitions. [2021-05-06 08:50:00,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-06 08:50:00,534 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:50:00,534 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:50:00,737 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-06 08:50:00,737 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:50:00,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:50:00,737 INFO L82 PathProgramCache]: Analyzing trace with hash 113245770, now seen corresponding path program 1 times [2021-05-06 08:50:00,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:50:00,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068836106] [2021-05-06 08:50:00,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:50:00,742 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:50:00,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1968223056] [2021-05-06 08:50:00,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:50:00,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:50:00,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-06 08:50:00,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:50:00,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:00,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:00,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:00,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:00,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:00,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:00,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:00,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:00,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:00,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:00,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:00,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:00,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:00,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:00,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:00,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:01,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:01,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:01,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:01,131 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 36 proven. 10 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-05-06 08:50:01,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:50:01,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068836106] [2021-05-06 08:50:01,131 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:50:01,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968223056] [2021-05-06 08:50:01,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968223056] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:50:01,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:50:01,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 08:50:01,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477131980] [2021-05-06 08:50:01,132 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 08:50:01,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:50:01,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 08:50:01,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:50:01,133 INFO L87 Difference]: Start difference. First operand 155 states and 183 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 10 states have internal predecessors, (28), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 08:50:01,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:50:01,331 INFO L93 Difference]: Finished difference Result 161 states and 188 transitions. [2021-05-06 08:50:01,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:50:01,332 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 10 states have internal predecessors, (28), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 68 [2021-05-06 08:50:01,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:50:01,334 INFO L225 Difference]: With dead ends: 161 [2021-05-06 08:50:01,334 INFO L226 Difference]: Without dead ends: 161 [2021-05-06 08:50:01,334 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 137.3ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-06 08:50:01,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-05-06 08:50:01,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 159. [2021-05-06 08:50:01,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 103 states have (on average 1.1553398058252426) internal successors, (119), 107 states have internal predecessors, (119), 35 states have call successors, (35), 21 states have call predecessors, (35), 20 states have return successors, (32), 30 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-06 08:50:01,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 186 transitions. [2021-05-06 08:50:01,342 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 186 transitions. Word has length 68 [2021-05-06 08:50:01,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:50:01,344 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 186 transitions. [2021-05-06 08:50:01,344 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 10 states have internal predecessors, (28), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 08:50:01,344 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 186 transitions. [2021-05-06 08:50:01,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-06 08:50:01,345 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:50:01,345 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:50:01,558 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-06 08:50:01,559 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:50:01,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:50:01,559 INFO L82 PathProgramCache]: Analyzing trace with hash -742748636, now seen corresponding path program 1 times [2021-05-06 08:50:01,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:50:01,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798325098] [2021-05-06 08:50:01,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:50:01,566 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:50:01,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1223356988] [2021-05-06 08:50:01,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:50:01,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:50:01,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-06 08:50:01,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:50:01,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:01,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:01,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:01,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:01,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:01,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:01,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:01,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:01,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:01,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:01,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:01,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:01,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:01,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:01,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:01,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:01,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:01,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:01,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:01,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:01,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:01,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:01,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:01,917 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 20 proven. 11 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-05-06 08:50:01,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:50:01,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798325098] [2021-05-06 08:50:01,917 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:50:01,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223356988] [2021-05-06 08:50:01,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223356988] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:50:01,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:50:01,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:50:01,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154769963] [2021-05-06 08:50:01,919 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:50:01,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:50:01,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:50:01,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:50:01,920 INFO L87 Difference]: Start difference. First operand 159 states and 186 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 6 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 08:50:02,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:50:02,129 INFO L93 Difference]: Finished difference Result 184 states and 222 transitions. [2021-05-06 08:50:02,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 08:50:02,129 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 6 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 79 [2021-05-06 08:50:02,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:50:02,130 INFO L225 Difference]: With dead ends: 184 [2021-05-06 08:50:02,130 INFO L226 Difference]: Without dead ends: 156 [2021-05-06 08:50:02,131 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 129.4ms TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:50:02,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-05-06 08:50:02,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 143. [2021-05-06 08:50:02,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 91 states have (on average 1.1868131868131868) internal successors, (108), 95 states have internal predecessors, (108), 34 states have call successors, (34), 18 states have call predecessors, (34), 17 states have return successors, (31), 29 states have call predecessors, (31), 31 states have call successors, (31) [2021-05-06 08:50:02,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 173 transitions. [2021-05-06 08:50:02,134 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 173 transitions. Word has length 79 [2021-05-06 08:50:02,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:50:02,134 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 173 transitions. [2021-05-06 08:50:02,134 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 6 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 08:50:02,134 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 173 transitions. [2021-05-06 08:50:02,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-06 08:50:02,135 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:50:02,135 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:50:02,345 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:50:02,345 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:50:02,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:50:02,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1708320559, now seen corresponding path program 2 times [2021-05-06 08:50:02,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:50:02,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370393337] [2021-05-06 08:50:02,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:50:02,350 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:50:02,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1202017130] [2021-05-06 08:50:02,350 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:50:02,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:50:02,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:50:02,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 08:50:02,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:50:02,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:02,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:02,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:02,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:02,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:02,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:02,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:02,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:02,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:02,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:02,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:02,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:02,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:02,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:02,518 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 54 proven. 132 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-05-06 08:50:02,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:50:02,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370393337] [2021-05-06 08:50:02,518 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:50:02,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202017130] [2021-05-06 08:50:02,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202017130] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:50:02,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:50:02,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:50:02,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275320576] [2021-05-06 08:50:02,519 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 08:50:02,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:50:02,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 08:50:02,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:50:02,519 INFO L87 Difference]: Start difference. First operand 143 states and 173 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 6 states have call successors, (14), 6 states have call predecessors, (14), 5 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) [2021-05-06 08:50:02,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:50:02,582 INFO L93 Difference]: Finished difference Result 145 states and 175 transitions. [2021-05-06 08:50:02,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 08:50:02,582 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 6 states have call successors, (14), 6 states have call predecessors, (14), 5 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) Word has length 79 [2021-05-06 08:50:02,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:50:02,583 INFO L225 Difference]: With dead ends: 145 [2021-05-06 08:50:02,583 INFO L226 Difference]: Without dead ends: 145 [2021-05-06 08:50:02,583 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 34.4ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:50:02,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-05-06 08:50:02,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-05-06 08:50:02,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 93 states have (on average 1.1827956989247312) internal successors, (110), 97 states have internal predecessors, (110), 34 states have call successors, (34), 18 states have call predecessors, (34), 17 states have return successors, (31), 29 states have call predecessors, (31), 31 states have call successors, (31) [2021-05-06 08:50:02,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 175 transitions. [2021-05-06 08:50:02,587 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 175 transitions. Word has length 79 [2021-05-06 08:50:02,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:50:02,587 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 175 transitions. [2021-05-06 08:50:02,587 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 6 states have call successors, (14), 6 states have call predecessors, (14), 5 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) [2021-05-06 08:50:02,587 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 175 transitions. [2021-05-06 08:50:02,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-05-06 08:50:02,588 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:50:02,588 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:50:02,800 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-06 08:50:02,801 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:50:02,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:50:02,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1815149533, now seen corresponding path program 3 times [2021-05-06 08:50:02,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:50:02,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221334627] [2021-05-06 08:50:02,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:50:02,806 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:50:02,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1042332512] [2021-05-06 08:50:02,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:50:02,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 08:50:02,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:50:02,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 08:50:02,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:50:03,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:03,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:03,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:03,066 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 62 proven. 7 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2021-05-06 08:50:03,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:50:03,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221334627] [2021-05-06 08:50:03,066 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:50:03,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042332512] [2021-05-06 08:50:03,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042332512] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:50:03,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:50:03,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:50:03,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847507714] [2021-05-06 08:50:03,067 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:50:03,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:50:03,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:50:03,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:50:03,068 INFO L87 Difference]: Start difference. First operand 145 states and 175 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-06 08:50:03,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:50:03,569 INFO L93 Difference]: Finished difference Result 173 states and 213 transitions. [2021-05-06 08:50:03,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:50:03,569 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 82 [2021-05-06 08:50:03,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:50:03,570 INFO L225 Difference]: With dead ends: 173 [2021-05-06 08:50:03,570 INFO L226 Difference]: Without dead ends: 173 [2021-05-06 08:50:03,570 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 125.3ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:50:03,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-05-06 08:50:03,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 167. [2021-05-06 08:50:03,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 107 states have (on average 1.1869158878504673) internal successors, (127), 113 states have internal predecessors, (127), 40 states have call successors, (40), 20 states have call predecessors, (40), 19 states have return successors, (37), 33 states have call predecessors, (37), 37 states have call successors, (37) [2021-05-06 08:50:03,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 204 transitions. [2021-05-06 08:50:03,574 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 204 transitions. Word has length 82 [2021-05-06 08:50:03,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:50:03,574 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 204 transitions. [2021-05-06 08:50:03,575 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-06 08:50:03,575 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 204 transitions. [2021-05-06 08:50:03,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-06 08:50:03,575 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:50:03,575 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:50:03,788 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:50:03,789 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:50:03,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:50:03,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1960725647, now seen corresponding path program 2 times [2021-05-06 08:50:03,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:50:03,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416631007] [2021-05-06 08:50:03,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:50:03,794 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:50:03,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [527127592] [2021-05-06 08:50:03,795 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:50:03,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:50:03,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:50:03,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 08:50:03,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:50:03,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:03,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:03,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:03,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:03,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:03,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:03,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:03,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:03,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:03,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:03,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:03,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:03,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:03,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:03,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:03,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:04,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:04,008 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 22 proven. 200 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-06 08:50:04,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:50:04,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416631007] [2021-05-06 08:50:04,008 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:50:04,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527127592] [2021-05-06 08:50:04,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527127592] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:50:04,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:50:04,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:50:04,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362677273] [2021-05-06 08:50:04,009 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:50:04,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:50:04,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:50:04,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:50:04,009 INFO L87 Difference]: Start difference. First operand 167 states and 204 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 7 states have call successors, (15), 7 states have call predecessors, (15), 5 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) [2021-05-06 08:50:04,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:50:04,074 INFO L93 Difference]: Finished difference Result 194 states and 229 transitions. [2021-05-06 08:50:04,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:50:04,075 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 7 states have call successors, (15), 7 states have call predecessors, (15), 5 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) Word has length 86 [2021-05-06 08:50:04,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:50:04,076 INFO L225 Difference]: With dead ends: 194 [2021-05-06 08:50:04,076 INFO L226 Difference]: Without dead ends: 194 [2021-05-06 08:50:04,076 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 20.8ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:50:04,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-05-06 08:50:04,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 193. [2021-05-06 08:50:04,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 125 states have (on average 1.16) internal successors, (145), 131 states have internal predecessors, (145), 43 states have call successors, (43), 25 states have call predecessors, (43), 24 states have return successors, (40), 36 states have call predecessors, (40), 40 states have call successors, (40) [2021-05-06 08:50:04,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 228 transitions. [2021-05-06 08:50:04,080 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 228 transitions. Word has length 86 [2021-05-06 08:50:04,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:50:04,080 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 228 transitions. [2021-05-06 08:50:04,081 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 7 states have call successors, (15), 7 states have call predecessors, (15), 5 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) [2021-05-06 08:50:04,081 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 228 transitions. [2021-05-06 08:50:04,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-06 08:50:04,081 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:50:04,081 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:50:04,296 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:50:04,297 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:50:04,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:50:04,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1959623380, now seen corresponding path program 2 times [2021-05-06 08:50:04,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:50:04,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570584537] [2021-05-06 08:50:04,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:50:04,312 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:50:04,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [940391341] [2021-05-06 08:50:04,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:50:04,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:50:04,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:50:04,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-06 08:50:04,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:50:04,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:04,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:04,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:04,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:04,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:04,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:04,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:04,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:04,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:04,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:04,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:04,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:04,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:04,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:04,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:04,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:04,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:04,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:04,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:04,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:04,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:04,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:04,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:04,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:04,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:04,777 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 36 proven. 37 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-05-06 08:50:04,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:50:04,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570584537] [2021-05-06 08:50:04,778 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:50:04,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940391341] [2021-05-06 08:50:04,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940391341] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:50:04,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:50:04,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-06 08:50:04,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896286519] [2021-05-06 08:50:04,779 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 08:50:04,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:50:04,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 08:50:04,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:50:04,780 INFO L87 Difference]: Start difference. First operand 193 states and 228 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 13 states have internal predecessors, (31), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 08:50:05,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:50:05,240 INFO L93 Difference]: Finished difference Result 203 states and 240 transitions. [2021-05-06 08:50:05,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 08:50:05,241 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 13 states have internal predecessors, (31), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) Word has length 86 [2021-05-06 08:50:05,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:50:05,242 INFO L225 Difference]: With dead ends: 203 [2021-05-06 08:50:05,242 INFO L226 Difference]: Without dead ends: 203 [2021-05-06 08:50:05,242 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 180.0ms TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-05-06 08:50:05,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-05-06 08:50:05,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 200. [2021-05-06 08:50:05,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 130 states have (on average 1.1615384615384616) internal successors, (151), 137 states have internal predecessors, (151), 44 states have call successors, (44), 26 states have call predecessors, (44), 25 states have return successors, (41), 36 states have call predecessors, (41), 41 states have call successors, (41) [2021-05-06 08:50:05,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 236 transitions. [2021-05-06 08:50:05,246 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 236 transitions. Word has length 86 [2021-05-06 08:50:05,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:50:05,247 INFO L480 AbstractCegarLoop]: Abstraction has 200 states and 236 transitions. [2021-05-06 08:50:05,247 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 13 states have internal predecessors, (31), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 08:50:05,247 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 236 transitions. [2021-05-06 08:50:05,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-05-06 08:50:05,247 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:50:05,248 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:50:05,461 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-06 08:50:05,461 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:50:05,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:50:05,461 INFO L82 PathProgramCache]: Analyzing trace with hash 31379631, now seen corresponding path program 3 times [2021-05-06 08:50:05,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:50:05,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389108894] [2021-05-06 08:50:05,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:50:05,468 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:50:05,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1585617100] [2021-05-06 08:50:05,468 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:50:05,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-06 08:50:05,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:50:05,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 08:50:05,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:50:05,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:05,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:05,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:05,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:05,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:05,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:05,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:05,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:05,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:05,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:05,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:05,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:05,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:05,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:05,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:05,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:05,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:05,734 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 72 proven. 260 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-05-06 08:50:05,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:50:05,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389108894] [2021-05-06 08:50:05,734 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:50:05,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585617100] [2021-05-06 08:50:05,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585617100] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:50:05,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:50:05,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:50:05,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490535584] [2021-05-06 08:50:05,735 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:50:05,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:50:05,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:50:05,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:50:05,736 INFO L87 Difference]: Start difference. First operand 200 states and 236 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (17), 7 states have call predecessors, (17), 6 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) [2021-05-06 08:50:05,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:50:05,814 INFO L93 Difference]: Finished difference Result 202 states and 238 transitions. [2021-05-06 08:50:05,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:50:05,816 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (17), 7 states have call predecessors, (17), 6 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) Word has length 97 [2021-05-06 08:50:05,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:50:05,816 INFO L225 Difference]: With dead ends: 202 [2021-05-06 08:50:05,817 INFO L226 Difference]: Without dead ends: 202 [2021-05-06 08:50:05,817 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 34.8ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:50:05,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-05-06 08:50:05,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2021-05-06 08:50:05,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 132 states have (on average 1.1590909090909092) internal successors, (153), 139 states have internal predecessors, (153), 44 states have call successors, (44), 26 states have call predecessors, (44), 25 states have return successors, (41), 36 states have call predecessors, (41), 41 states have call successors, (41) [2021-05-06 08:50:05,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 238 transitions. [2021-05-06 08:50:05,821 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 238 transitions. Word has length 97 [2021-05-06 08:50:05,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:50:05,822 INFO L480 AbstractCegarLoop]: Abstraction has 202 states and 238 transitions. [2021-05-06 08:50:05,822 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (17), 7 states have call predecessors, (17), 6 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) [2021-05-06 08:50:05,822 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 238 transitions. [2021-05-06 08:50:05,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-05-06 08:50:05,823 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:50:05,823 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 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, 1] [2021-05-06 08:50:06,043 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:50:06,043 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:50:06,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:50:06,043 INFO L82 PathProgramCache]: Analyzing trace with hash -874901792, now seen corresponding path program 3 times [2021-05-06 08:50:06,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:50:06,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440620021] [2021-05-06 08:50:06,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:50:06,048 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:50:06,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [243016534] [2021-05-06 08:50:06,049 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:50:06,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 08:50:06,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:50:06,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-06 08:50:06,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:50:06,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:06,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:06,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:06,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:06,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:06,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:06,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:06,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:06,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:06,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:06,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:06,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:06,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:06,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:06,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:06,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:06,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:06,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:06,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:06,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:06,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:06,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:06,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:06,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:06,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:06,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:06,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:06,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:06,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:06,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:06,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:06,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:06,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:06,573 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 61 proven. 29 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-05-06 08:50:06,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:50:06,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440620021] [2021-05-06 08:50:06,573 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:50:06,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243016534] [2021-05-06 08:50:06,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243016534] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:50:06,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:50:06,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-06 08:50:06,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066165617] [2021-05-06 08:50:06,574 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-06 08:50:06,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:50:06,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-06 08:50:06,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-05-06 08:50:06,575 INFO L87 Difference]: Start difference. First operand 202 states and 238 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 13 states have internal predecessors, (35), 6 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 08:50:07,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:50:07,585 INFO L93 Difference]: Finished difference Result 213 states and 248 transitions. [2021-05-06 08:50:07,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 08:50:07,586 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 13 states have internal predecessors, (35), 6 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) Word has length 100 [2021-05-06 08:50:07,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:50:07,586 INFO L225 Difference]: With dead ends: 213 [2021-05-06 08:50:07,586 INFO L226 Difference]: Without dead ends: 192 [2021-05-06 08:50:07,587 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 316.5ms TimeCoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-05-06 08:50:07,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-05-06 08:50:07,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2021-05-06 08:50:07,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 126 states have (on average 1.1428571428571428) internal successors, (144), 132 states have internal predecessors, (144), 41 states have call successors, (41), 25 states have call predecessors, (41), 24 states have return successors, (38), 34 states have call predecessors, (38), 38 states have call successors, (38) [2021-05-06 08:50:07,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 223 transitions. [2021-05-06 08:50:07,590 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 223 transitions. Word has length 100 [2021-05-06 08:50:07,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:50:07,591 INFO L480 AbstractCegarLoop]: Abstraction has 192 states and 223 transitions. [2021-05-06 08:50:07,591 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 13 states have internal predecessors, (35), 6 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 08:50:07,591 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 223 transitions. [2021-05-06 08:50:07,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-05-06 08:50:07,591 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:50:07,591 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:50:07,800 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-06 08:50:07,801 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:50:07,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:50:07,801 INFO L82 PathProgramCache]: Analyzing trace with hash -873799525, now seen corresponding path program 3 times [2021-05-06 08:50:07,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:50:07,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671348883] [2021-05-06 08:50:07,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:50:07,806 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:50:07,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [756650471] [2021-05-06 08:50:07,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:50:08,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 08:50:08,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:50:08,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-06 08:50:08,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:50:08,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:08,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:08,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:08,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:08,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:08,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:09,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:09,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:09,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:09,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:09,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:09,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:09,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:09,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:09,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:09,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:09,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:09,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:09,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:09,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:09,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:09,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:09,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:09,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:09,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:09,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:09,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:09,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:09,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:50:09,217 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 26 proven. 30 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2021-05-06 08:50:09,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:50:09,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671348883] [2021-05-06 08:50:09,218 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:50:09,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756650471] [2021-05-06 08:50:09,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756650471] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:50:09,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:50:09,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 08:50:09,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526315318] [2021-05-06 08:50:09,218 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 08:50:09,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:50:09,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 08:50:09,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:50:09,219 INFO L87 Difference]: Start difference. First operand 192 states and 223 transitions. Second operand has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 11 states have internal predecessors, (32), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 08:50:09,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:50:09,463 INFO L93 Difference]: Finished difference Result 196 states and 226 transitions. [2021-05-06 08:50:09,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 08:50:09,464 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 11 states have internal predecessors, (32), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) Word has length 100 [2021-05-06 08:50:09,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:50:09,464 INFO L225 Difference]: With dead ends: 196 [2021-05-06 08:50:09,465 INFO L226 Difference]: Without dead ends: 161 [2021-05-06 08:50:09,465 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 114.4ms TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:50:09,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-05-06 08:50:09,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2021-05-06 08:50:09,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 104 states have (on average 1.1634615384615385) internal successors, (121), 109 states have internal predecessors, (121), 36 states have call successors, (36), 21 states have call predecessors, (36), 20 states have return successors, (34), 30 states have call predecessors, (34), 34 states have call successors, (34) [2021-05-06 08:50:09,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 191 transitions. [2021-05-06 08:50:09,469 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 191 transitions. Word has length 100 [2021-05-06 08:50:09,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:50:09,469 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 191 transitions. [2021-05-06 08:50:09,469 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 11 states have internal predecessors, (32), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 08:50:09,469 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 191 transitions. [2021-05-06 08:50:09,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-06 08:50:09,469 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:50:09,470 INFO L523 BasicCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2021-05-06 08:50:09,675 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-06 08:50:09,675 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:50:09,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:50:09,676 INFO L82 PathProgramCache]: Analyzing trace with hash 1453917651, now seen corresponding path program 4 times [2021-05-06 08:50:09,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:50:09,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450501947] [2021-05-06 08:50:09,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:50:09,688 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:50:09,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1769868345] [2021-05-06 08:50:09,688 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:50:09,772 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:50:09,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-05-06 08:50:09,773 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 08:50:09,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-06 08:50:09,801 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 08:50:09,871 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-06 08:50:09,872 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-06 08:50:10,100 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:50:10,172 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 08:50:10 BasicIcfg [2021-05-06 08:50:10,172 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 08:50:10,173 INFO L168 Benchmark]: Toolchain (without parser) took 16679.76 ms. Allocated memory was 199.2 MB in the beginning and 287.3 MB in the end (delta: 88.1 MB). Free memory was 164.0 MB in the beginning and 156.2 MB in the end (delta: 7.8 MB). Peak memory consumption was 96.1 MB. Max. memory is 8.0 GB. [2021-05-06 08:50:10,173 INFO L168 Benchmark]: CDTParser took 0.09 ms. Allocated memory is still 199.2 MB. Free memory is still 180.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 08:50:10,173 INFO L168 Benchmark]: CACSL2BoogieTranslator took 170.85 ms. Allocated memory is still 199.2 MB. Free memory was 163.8 MB in the beginning and 182.0 MB in the end (delta: -18.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-05-06 08:50:10,173 INFO L168 Benchmark]: Boogie Preprocessor took 39.70 ms. Allocated memory is still 199.2 MB. Free memory was 182.0 MB in the beginning and 180.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 08:50:10,173 INFO L168 Benchmark]: RCFGBuilder took 298.29 ms. Allocated memory is still 199.2 MB. Free memory was 180.4 MB in the beginning and 164.2 MB in the end (delta: 16.3 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-06 08:50:10,173 INFO L168 Benchmark]: IcfgTransformer took 24.35 ms. Allocated memory is still 199.2 MB. Free memory was 164.2 MB in the beginning and 162.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-06 08:50:10,173 INFO L168 Benchmark]: TraceAbstraction took 16140.43 ms. Allocated memory was 199.2 MB in the beginning and 287.3 MB in the end (delta: 88.1 MB). Free memory was 162.1 MB in the beginning and 156.2 MB in the end (delta: 5.9 MB). Peak memory consumption was 95.0 MB. Max. memory is 8.0 GB. [2021-05-06 08:50:10,173 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09 ms. Allocated memory is still 199.2 MB. Free memory is still 180.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 170.85 ms. Allocated memory is still 199.2 MB. Free memory was 163.8 MB in the beginning and 182.0 MB in the end (delta: -18.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 39.70 ms. Allocated memory is still 199.2 MB. Free memory was 182.0 MB in the beginning and 180.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 298.29 ms. Allocated memory is still 199.2 MB. Free memory was 180.4 MB in the beginning and 164.2 MB in the end (delta: 16.3 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 24.35 ms. Allocated memory is still 199.2 MB. Free memory was 164.2 MB in the beginning and 162.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 16140.43 ms. Allocated memory was 199.2 MB in the beginning and 287.3 MB in the end (delta: 88.1 MB). Free memory was 162.1 MB in the beginning and 156.2 MB in the end (delta: 5.9 MB). Peak memory consumption was 95.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 17]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L22] int counter = 0; VAL [\old(counter)=20, counter=0] [L24] unsigned int A, B; [L25] long long r, d, p, q; [L26] A = __VERIFIER_nondet_unsigned_int() [L27] B = __VERIFIER_nondet_unsigned_int() [L28] CALL assume_abort_if_not(B >= 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L12] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L28] RET assume_abort_if_not(B >= 1) VAL [\old(counter)=0, B=1, counter=0] [L30] r = A [L31] d = B [L32] p = 1 [L33] q = 0 VAL [\old(counter)=0, A=4, B=1, counter=0, d=1, p=1, q=0, r=4] [L35] EXPR counter++ VAL [\old(counter)=0, A=4, B=1, counter=1, counter++=0, d=1, p=1, q=0, r=4] [L35] COND TRUE counter++<5 [L36] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L36] RET __VERIFIER_assert(q == 0) VAL [\old(counter)=0, A=4, B=1, counter=1, d=1, p=1, q=0, r=4] [L37] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L37] RET __VERIFIER_assert(r == A) VAL [\old(counter)=0, A=4, B=1, counter=1, d=1, p=1, q=0, r=4] [L38] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L38] RET __VERIFIER_assert(d == B * p) VAL [\old(counter)=0, A=4, B=1, counter=1, d=1, p=1, q=0, r=4] [L39] COND FALSE !(!(r >= d)) [L41] d = 2 * d [L42] p = 2 * p VAL [\old(counter)=0, A=4, B=1, counter=1, d=2, p=2, q=0, r=4] [L35] EXPR counter++ VAL [\old(counter)=0, A=4, B=1, counter=2, counter++=1, d=2, p=2, q=0, r=4] [L35] COND TRUE counter++<5 [L36] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L36] RET __VERIFIER_assert(q == 0) VAL [\old(counter)=0, A=4, B=1, counter=2, d=2, p=2, q=0, r=4] [L37] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L37] RET __VERIFIER_assert(r == A) VAL [\old(counter)=0, A=4, B=1, counter=2, d=2, p=2, q=0, r=4] [L38] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L38] RET __VERIFIER_assert(d == B * p) VAL [\old(counter)=0, A=4, B=1, counter=2, d=2, p=2, q=0, r=4] [L39] COND FALSE !(!(r >= d)) [L41] d = 2 * d [L42] p = 2 * p VAL [\old(counter)=0, A=4, B=1, counter=2, d=4, p=4, q=0, r=4] [L35] EXPR counter++ VAL [\old(counter)=0, A=4, B=1, counter=3, counter++=2, d=4, p=4, q=0, r=4] [L35] COND TRUE counter++<5 [L36] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L36] RET __VERIFIER_assert(q == 0) VAL [\old(counter)=0, A=4, B=1, counter=3, d=4, p=4, q=0, r=4] [L37] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L37] RET __VERIFIER_assert(r == A) VAL [\old(counter)=0, A=4, B=1, counter=3, d=4, p=4, q=0, r=4] [L38] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L38] RET __VERIFIER_assert(d == B * p) VAL [\old(counter)=0, A=4, B=1, counter=3, d=4, p=4, q=0, r=4] [L39] COND FALSE !(!(r >= d)) [L41] d = 2 * d [L42] p = 2 * p VAL [\old(counter)=0, A=4, B=1, counter=3, d=8, p=8, q=0, r=4] [L35] EXPR counter++ VAL [\old(counter)=0, A=4, B=1, counter=4, counter++=3, d=8, p=8, q=0, r=4] [L35] COND TRUE counter++<5 [L36] CALL __VERIFIER_assert(q == 0) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L36] RET __VERIFIER_assert(q == 0) VAL [\old(counter)=0, A=4, B=1, counter=4, d=8, p=8, q=0, r=4] [L37] CALL __VERIFIER_assert(r == A) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L37] RET __VERIFIER_assert(r == A) VAL [\old(counter)=0, A=4, B=1, counter=4, d=8, p=8, q=0, r=4] [L38] CALL __VERIFIER_assert(d == B * p) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L38] RET __VERIFIER_assert(d == B * p) VAL [\old(counter)=0, A=4, B=1, counter=4, d=8, p=8, q=0, r=4] [L39] COND TRUE !(r >= d) VAL [\old(counter)=0, A=4, B=1, counter=4, d=8, p=8, q=0, r=4] [L45] EXPR counter++ VAL [\old(counter)=0, A=4, B=1, counter=5, counter++=4, d=8, p=8, q=0, r=4] [L45] COND TRUE counter++<5 [L46] CALL __VERIFIER_assert(A == q*B + r) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L46] RET __VERIFIER_assert(A == q*B + r) VAL [\old(counter)=0, A=4, B=1, counter=5, d=8, p=8, q=0, r=4] [L47] CALL __VERIFIER_assert(d == B*p) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L15] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L47] RET __VERIFIER_assert(d == B*p) VAL [\old(counter)=0, A=4, B=1, counter=5, d=8, p=8, q=0, r=4] [L49] COND FALSE !(!(p != 1)) [L51] d = d / 2 [L52] p = p / 2 VAL [\old(counter)=0, A=4, B=1, counter=5, d=4, p=4, q=0, r=4] [L53] COND TRUE r >= d [L54] r = r - d [L55] q = q + p VAL [\old(counter)=0, A=4, B=1, counter=5, d=4, p=4, q=4, r=0] [L45] EXPR counter++ VAL [\old(counter)=0, A=4, B=1, counter=6, counter++=5, d=4, p=4, q=4, r=0] [L45] COND FALSE !(counter++<5) [L59] CALL __VERIFIER_assert(A == d*q + r) VAL [\old(cond)=0, \old(counter)=0, counter=6] [L15] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=6] [L17] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=6] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 37 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 16027.6ms, OverallIterations: 25, TraceHistogramMax: 15, EmptinessCheckTime: 24.0ms, AutomataDifference: 4154.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 8.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1120 SDtfs, 471 SDslu, 4275 SDs, 0 SdLazy, 2981 SolverSat, 343 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2932.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1390 GetRequests, 1207 SyntacticMatches, 1 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 1690.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=202occurred in iteration=22, InterpolantAutomatonStates: 200, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 124.5ms AutomataMinimizationTime, 24 MinimizatonAttempts, 56 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 202.3ms SsaConstructionTime, 1664.2ms SatisfiabilityAnalysisTime, 4057.5ms InterpolantComputationTime, 1501 NumberOfCodeBlocks, 1366 NumberOfCodeBlocksAsserted, 44 NumberOfCheckSat, 1373 ConstructedInterpolants, 0 QuantifiedInterpolants, 6994 SizeOfPredicates, 64 NumberOfNonLiveVariables, 4071 ConjunctsInSsa, 340 ConjunctsInUnsatCore, 24 InterpolantComputations, 8 PerfectInterpolantSequences, 2310/3235 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...