/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_unwindbound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 20:52:33,737 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 20:52:33,739 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 20:52:33,770 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 20:52:33,771 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 20:52:33,773 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 20:52:33,775 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 20:52:33,778 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 20:52:33,780 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 20:52:33,783 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 20:52:33,784 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 20:52:33,785 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 20:52:33,785 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 20:52:33,786 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 20:52:33,787 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 20:52:33,788 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 20:52:33,790 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 20:52:33,790 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 20:52:33,792 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 20:52:33,796 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 20:52:33,796 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 20:52:33,797 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 20:52:33,799 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 20:52:33,801 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 20:52:33,805 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 20:52:33,811 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 20:52:33,811 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 20:52:33,812 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 20:52:33,812 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 20:52:33,824 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 20:52:33,824 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 20:52:33,826 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 20:52:33,827 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 20:52:33,827 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 20:52:33,827 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 20:52:33,827 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 20:52:33,827 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 20:52:33,827 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 20:52:33,827 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 20:52:33,828 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 20:52:33,828 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 20:52:33,828 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 20:52:33,828 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 20:52:33,828 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 20:52:33,829 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 20:52:33,829 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 20:52:33,829 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 20:52:33,829 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:52:33,829 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 20:52:33,829 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 20:52:33,830 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 20:52:33,830 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 20:52:34,089 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 20:52:34,108 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 20:52:34,110 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 20:52:34,111 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 20:52:34,111 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 20:52:34,111 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-ll_unwindbound20.c [2021-05-02 20:52:34,155 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af6ddfbdb/69fc35b1df7344d1a824c580a432ef42/FLAGa617eb0a9 [2021-05-02 20:52:34,466 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 20:52:34,467 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_unwindbound20.c [2021-05-02 20:52:34,471 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af6ddfbdb/69fc35b1df7344d1a824c580a432ef42/FLAGa617eb0a9 [2021-05-02 20:52:34,908 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af6ddfbdb/69fc35b1df7344d1a824c580a432ef42 [2021-05-02 20:52:34,910 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 20:52:34,911 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 20:52:34,914 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 20:52:34,914 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 20:52:34,916 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 20:52:34,917 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:52:34" (1/1) ... [2021-05-02 20:52:34,918 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6edfd999 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:52:34, skipping insertion in model container [2021-05-02 20:52:34,918 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:52:34" (1/1) ... [2021-05-02 20:52:34,922 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 20:52:34,931 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 20:52:35,002 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_unwindbound20.c[546,559] [2021-05-02 20:52:35,013 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:52:35,019 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 20:52:35,026 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_unwindbound20.c[546,559] [2021-05-02 20:52:35,030 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:52:35,038 INFO L208 MainTranslator]: Completed translation [2021-05-02 20:52:35,038 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:52:35 WrapperNode [2021-05-02 20:52:35,038 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 20:52:35,039 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 20:52:35,039 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 20:52:35,039 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 20:52:35,058 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:52:35" (1/1) ... [2021-05-02 20:52:35,058 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:52:35" (1/1) ... [2021-05-02 20:52:35,078 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:52:35" (1/1) ... [2021-05-02 20:52:35,079 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:52:35" (1/1) ... [2021-05-02 20:52:35,090 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:52:35" (1/1) ... [2021-05-02 20:52:35,093 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:52:35" (1/1) ... [2021-05-02 20:52:35,094 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:52:35" (1/1) ... [2021-05-02 20:52:35,095 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 20:52:35,095 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 20:52:35,095 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 20:52:35,095 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 20:52:35,096 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:52:35" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:52:35,151 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 20:52:35,151 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 20:52:35,151 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 20:52:35,151 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 20:52:35,151 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 20:52:35,151 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 20:52:35,152 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 20:52:35,152 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 20:52:35,152 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 20:52:35,152 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 20:52:35,152 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-02 20:52:35,152 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 20:52:35,152 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 20:52:35,153 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 20:52:35,153 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 20:52:35,153 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 20:52:35,153 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 20:52:35,153 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 20:52:35,154 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 20:52:35,154 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 20:52:35,353 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 20:52:35,353 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 20:52:35,354 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:52:35 BoogieIcfgContainer [2021-05-02 20:52:35,354 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 20:52:35,354 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 20:52:35,354 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 20:52:35,355 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 20:52:35,356 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:52:35" (1/1) ... [2021-05-02 20:52:35,390 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:52:35 BasicIcfg [2021-05-02 20:52:35,390 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 20:52:35,391 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 20:52:35,391 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 20:52:35,392 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 20:52:35,392 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 08:52:34" (1/4) ... [2021-05-02 20:52:35,393 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f0c83da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:52:35, skipping insertion in model container [2021-05-02 20:52:35,393 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:52:35" (2/4) ... [2021-05-02 20:52:35,393 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f0c83da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:52:35, skipping insertion in model container [2021-05-02 20:52:35,393 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:52:35" (3/4) ... [2021-05-02 20:52:35,393 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f0c83da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:52:35, skipping insertion in model container [2021-05-02 20:52:35,394 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:52:35" (4/4) ... [2021-05-02 20:52:35,394 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-ll_unwindbound20.cJordan [2021-05-02 20:52:35,399 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 20:52:35,401 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 20:52:35,412 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 20:52:35,429 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 20:52:35,429 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 20:52:35,429 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 20:52:35,429 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 20:52:35,429 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 20:52:35,429 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 20:52:35,429 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 20:52:35,429 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 20:52:35,442 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) [2021-05-02 20:52:35,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 20:52:35,447 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:35,447 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:52:35,448 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:35,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:35,451 INFO L82 PathProgramCache]: Analyzing trace with hash 79654685, now seen corresponding path program 1 times [2021-05-02 20:52:35,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:35,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200936074] [2021-05-02 20:52:35,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:35,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:35,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:52:35,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:35,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:52:35,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:35,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 20:52:35,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:52:35,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200936074] [2021-05-02 20:52:35,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200936074] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:52:35,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:52:35,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 20:52:35,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358051905] [2021-05-02 20:52:35,665 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 20:52:35,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:52:35,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 20:52:35,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:52:35,674 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) [2021-05-02 20:52:35,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:35,770 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2021-05-02 20:52:35,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 20:52:35,771 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 [2021-05-02 20:52:35,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:35,776 INFO L225 Difference]: With dead ends: 38 [2021-05-02 20:52:35,777 INFO L226 Difference]: Without dead ends: 33 [2021-05-02 20:52:35,777 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:52:35,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-02 20:52:35,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2021-05-02 20:52:35,802 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) [2021-05-02 20:52:35,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2021-05-02 20:52:35,806 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 18 [2021-05-02 20:52:35,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:35,806 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2021-05-02 20:52:35,806 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) [2021-05-02 20:52:35,806 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2021-05-02 20:52:35,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 20:52:35,807 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:35,807 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:52:35,807 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 20:52:35,808 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:35,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:35,808 INFO L82 PathProgramCache]: Analyzing trace with hash -85369733, now seen corresponding path program 1 times [2021-05-02 20:52:35,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:35,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982718250] [2021-05-02 20:52:35,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:35,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:35,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:52:35,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:35,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:52:35,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:35,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 20:52:35,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:52:35,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982718250] [2021-05-02 20:52:35,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982718250] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:52:35,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:52:35,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 20:52:35,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991965451] [2021-05-02 20:52:35,954 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:52:35,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:52:35,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:52:35,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:52:35,955 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) [2021-05-02 20:52:36,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:36,170 INFO L93 Difference]: Finished difference Result 45 states and 60 transitions. [2021-05-02 20:52:36,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:52:36,171 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 [2021-05-02 20:52:36,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:36,173 INFO L225 Difference]: With dead ends: 45 [2021-05-02 20:52:36,173 INFO L226 Difference]: Without dead ends: 45 [2021-05-02 20:52:36,173 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 121.3ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:52:36,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-02 20:52:36,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2021-05-02 20:52:36,183 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) [2021-05-02 20:52:36,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2021-05-02 20:52:36,186 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 18 [2021-05-02 20:52:36,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:36,186 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2021-05-02 20:52:36,186 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) [2021-05-02 20:52:36,186 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2021-05-02 20:52:36,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-02 20:52:36,187 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:36,188 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] [2021-05-02 20:52:36,189 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 20:52:36,190 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:36,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:36,191 INFO L82 PathProgramCache]: Analyzing trace with hash -1527809342, now seen corresponding path program 1 times [2021-05-02 20:52:36,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:36,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066316019] [2021-05-02 20:52:36,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:36,211 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:52:36,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [899122442] [2021-05-02 20:52:36,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:52:36,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:36,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 20:52:36,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:52:36,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:36,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:36,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:36,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:36,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:36,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 20:52:36,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:52:36,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066316019] [2021-05-02 20:52:36,344 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:52:36,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899122442] [2021-05-02 20:52:36,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899122442] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:52:36,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:52:36,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 20:52:36,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652486203] [2021-05-02 20:52:36,345 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 20:52:36,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:52:36,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 20:52:36,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 20:52:36,346 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) [2021-05-02 20:52:36,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:36,355 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2021-05-02 20:52:36,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 20:52:36,355 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 [2021-05-02 20:52:36,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:36,356 INFO L225 Difference]: With dead ends: 38 [2021-05-02 20:52:36,356 INFO L226 Difference]: Without dead ends: 38 [2021-05-02 20:52:36,356 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 20:52:36,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-02 20:52:36,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-05-02 20:52:36,362 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) [2021-05-02 20:52:36,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2021-05-02 20:52:36,363 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 20 [2021-05-02 20:52:36,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:36,363 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2021-05-02 20:52:36,363 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) [2021-05-02 20:52:36,363 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2021-05-02 20:52:36,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 20:52:36,364 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:36,364 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] [2021-05-02 20:52:36,579 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-02 20:52:36,579 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:36,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:36,580 INFO L82 PathProgramCache]: Analyzing trace with hash 2128444854, now seen corresponding path program 1 times [2021-05-02 20:52:36,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:36,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460025535] [2021-05-02 20:52:36,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:36,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:36,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:52:36,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:36,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:52:36,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:36,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-05-02 20:52:36,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:36,662 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 20:52:36,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:52:36,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460025535] [2021-05-02 20:52:36,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460025535] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:52:36,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:52:36,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 20:52:36,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543646734] [2021-05-02 20:52:36,663 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:52:36,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:52:36,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:52:36,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:52:36,664 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) [2021-05-02 20:52:36,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:36,844 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2021-05-02 20:52:36,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:52:36,844 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 [2021-05-02 20:52:36,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:36,846 INFO L225 Difference]: With dead ends: 50 [2021-05-02 20:52:36,846 INFO L226 Difference]: Without dead ends: 50 [2021-05-02 20:52:36,846 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 99.2ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:52:36,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-02 20:52:36,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2021-05-02 20:52:36,849 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) [2021-05-02 20:52:36,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2021-05-02 20:52:36,849 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 23 [2021-05-02 20:52:36,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:36,849 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2021-05-02 20:52:36,850 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) [2021-05-02 20:52:36,850 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2021-05-02 20:52:36,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 20:52:36,850 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:36,850 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] [2021-05-02 20:52:36,850 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-02 20:52:36,850 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:36,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:36,851 INFO L82 PathProgramCache]: Analyzing trace with hash 135546551, now seen corresponding path program 1 times [2021-05-02 20:52:36,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:36,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292763929] [2021-05-02 20:52:36,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:36,857 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:52:36,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1239477431] [2021-05-02 20:52:36,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:52:36,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:36,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 20:52:36,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:52:36,997 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 20:52:36,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:52:36,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292763929] [2021-05-02 20:52:36,997 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:52:36,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239477431] [2021-05-02 20:52:36,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239477431] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:52:36,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:52:36,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:52:36,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111013670] [2021-05-02 20:52:36,998 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:52:36,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:52:36,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:52:36,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:52:36,999 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:52:37,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:37,114 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2021-05-02 20:52:37,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 20:52:37,115 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2021-05-02 20:52:37,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:37,116 INFO L225 Difference]: With dead ends: 61 [2021-05-02 20:52:37,116 INFO L226 Difference]: Without dead ends: 60 [2021-05-02 20:52:37,116 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 39.6ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:52:37,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-02 20:52:37,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-05-02 20:52:37,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 38 states have internal predecessors, (44), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 20:52:37,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 73 transitions. [2021-05-02 20:52:37,119 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 73 transitions. Word has length 28 [2021-05-02 20:52:37,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:37,120 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 73 transitions. [2021-05-02 20:52:37,120 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:52:37,120 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 73 transitions. [2021-05-02 20:52:37,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 20:52:37,120 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:37,120 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] [2021-05-02 20:52:37,324 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:52:37,325 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:37,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:37,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1016025214, now seen corresponding path program 1 times [2021-05-02 20:52:37,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:37,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970582549] [2021-05-02 20:52:37,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:37,351 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:52:37,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2127420640] [2021-05-02 20:52:37,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:52:37,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:37,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 20:52:37,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:52:37,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:37,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:37,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:37,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:37,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:37,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:37,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:37,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:37,488 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 20:52:37,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:52:37,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970582549] [2021-05-02 20:52:37,488 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:52:37,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127420640] [2021-05-02 20:52:37,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127420640] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:52:37,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:52:37,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 20:52:37,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962091184] [2021-05-02 20:52:37,489 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 20:52:37,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:52:37,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 20:52:37,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:52:37,490 INFO L87 Difference]: Start difference. First operand 60 states and 73 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) [2021-05-02 20:52:37,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:37,523 INFO L93 Difference]: Finished difference Result 69 states and 79 transitions. [2021-05-02 20:52:37,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 20:52:37,525 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 [2021-05-02 20:52:37,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:37,525 INFO L225 Difference]: With dead ends: 69 [2021-05-02 20:52:37,525 INFO L226 Difference]: Without dead ends: 69 [2021-05-02 20:52:37,525 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 6.7ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:52:37,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-02 20:52:37,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2021-05-02 20:52:37,528 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) [2021-05-02 20:52:37,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 78 transitions. [2021-05-02 20:52:37,530 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 78 transitions. Word has length 36 [2021-05-02 20:52:37,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:37,530 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 78 transitions. [2021-05-02 20:52:37,530 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) [2021-05-02 20:52:37,530 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 78 transitions. [2021-05-02 20:52:37,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 20:52:37,530 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:37,531 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] [2021-05-02 20:52:37,731 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:52:37,731 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:37,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:37,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1017127481, now seen corresponding path program 1 times [2021-05-02 20:52:37,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:37,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533211803] [2021-05-02 20:52:37,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:37,737 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:52:37,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1818915296] [2021-05-02 20:52:37,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:52:37,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:37,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 20:52:37,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:52:37,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:37,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:37,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:37,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:37,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:37,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:37,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:37,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:37,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:37,945 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 20:52:37,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:52:37,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533211803] [2021-05-02 20:52:37,946 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:52:37,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818915296] [2021-05-02 20:52:37,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818915296] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:52:37,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:52:37,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-02 20:52:37,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861663874] [2021-05-02 20:52:37,946 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:52:37,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:52:37,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:52:37,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:52:37,947 INFO L87 Difference]: Start difference. First operand 68 states and 78 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, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:52:38,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:38,073 INFO L93 Difference]: Finished difference Result 72 states and 81 transitions. [2021-05-02 20:52:38,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:52:38,073 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, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2021-05-02 20:52:38,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:38,075 INFO L225 Difference]: With dead ends: 72 [2021-05-02 20:52:38,075 INFO L226 Difference]: Without dead ends: 58 [2021-05-02 20:52:38,075 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 66.2ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:52:38,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-02 20:52:38,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-05-02 20:52:38,077 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) [2021-05-02 20:52:38,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2021-05-02 20:52:38,078 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 36 [2021-05-02 20:52:38,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:38,078 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2021-05-02 20:52:38,078 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, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:52:38,078 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2021-05-02 20:52:38,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 20:52:38,079 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:38,079 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] [2021-05-02 20:52:38,284 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:52:38,285 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:38,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:38,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1880362404, now seen corresponding path program 1 times [2021-05-02 20:52:38,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:38,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51112622] [2021-05-02 20:52:38,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:38,290 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:52:38,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2140060437] [2021-05-02 20:52:38,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:52:38,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:38,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 20:52:38,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:52:38,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:38,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:38,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:38,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:38,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:38,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:38,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:38,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:38,410 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 20:52:38,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:52:38,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51112622] [2021-05-02 20:52:38,411 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:52:38,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140060437] [2021-05-02 20:52:38,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140060437] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:52:38,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:52:38,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 20:52:38,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566084100] [2021-05-02 20:52:38,411 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 20:52:38,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:52:38,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 20:52:38,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:52:38,412 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) [2021-05-02 20:52:38,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:38,451 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2021-05-02 20:52:38,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 20:52:38,452 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 [2021-05-02 20:52:38,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:38,453 INFO L225 Difference]: With dead ends: 60 [2021-05-02 20:52:38,453 INFO L226 Difference]: Without dead ends: 60 [2021-05-02 20:52:38,453 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 12.4ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:52:38,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-02 20:52:38,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-05-02 20:52:38,455 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) [2021-05-02 20:52:38,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2021-05-02 20:52:38,456 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 38 [2021-05-02 20:52:38,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:38,456 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2021-05-02 20:52:38,456 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) [2021-05-02 20:52:38,456 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2021-05-02 20:52:38,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-02 20:52:38,457 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:38,457 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] [2021-05-02 20:52:38,672 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:52:38,672 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:38,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:38,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1525733273, now seen corresponding path program 1 times [2021-05-02 20:52:38,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:38,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399584139] [2021-05-02 20:52:38,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:38,678 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:52:38,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1251841207] [2021-05-02 20:52:38,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:52:38,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:38,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-02 20:52:38,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:52:38,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:38,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:38,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:38,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:38,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:38,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:38,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:38,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:38,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:38,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:38,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:38,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:38,914 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 9 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 20:52:38,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:52:38,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399584139] [2021-05-02 20:52:38,914 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:52:38,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251841207] [2021-05-02 20:52:38,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251841207] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:52:38,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:52:38,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:52:38,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452015670] [2021-05-02 20:52:38,915 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:52:38,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:52:38,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:52:38,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:52:38,915 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 9 states have internal predecessors, (21), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 20:52:39,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:39,145 INFO L93 Difference]: Finished difference Result 87 states and 106 transitions. [2021-05-02 20:52:39,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:52:39,146 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 9 states have internal predecessors, (21), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 46 [2021-05-02 20:52:39,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:39,147 INFO L225 Difference]: With dead ends: 87 [2021-05-02 20:52:39,147 INFO L226 Difference]: Without dead ends: 86 [2021-05-02 20:52:39,147 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 79.9ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:52:39,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-05-02 20:52:39,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2021-05-02 20:52:39,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 52 states have (on average 1.1923076923076923) internal successors, (62), 54 states have internal predecessors, (62), 21 states have call successors, (21), 11 states have call predecessors, (21), 10 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-02 20:52:39,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 101 transitions. [2021-05-02 20:52:39,151 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 101 transitions. Word has length 46 [2021-05-02 20:52:39,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:39,151 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 101 transitions. [2021-05-02 20:52:39,151 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 9 states have internal predecessors, (21), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 20:52:39,152 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 101 transitions. [2021-05-02 20:52:39,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-02 20:52:39,152 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:39,152 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] [2021-05-02 20:52:39,357 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:52:39,357 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:39,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:39,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1447419744, now seen corresponding path program 1 times [2021-05-02 20:52:39,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:39,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233682647] [2021-05-02 20:52:39,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:39,363 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:52:39,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [528608066] [2021-05-02 20:52:39,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:52:39,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:39,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 20:52:39,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:52:39,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:39,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:39,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:39,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:39,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:39,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:39,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:39,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:39,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:39,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:39,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:39,522 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 42 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 20:52:39,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:52:39,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233682647] [2021-05-02 20:52:39,522 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:52:39,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528608066] [2021-05-02 20:52:39,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528608066] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:52:39,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:52:39,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 20:52:39,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637976756] [2021-05-02 20:52:39,523 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:52:39,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:52:39,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:52:39,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:52:39,523 INFO L87 Difference]: Start difference. First operand 84 states and 101 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) [2021-05-02 20:52:39,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:39,552 INFO L93 Difference]: Finished difference Result 93 states and 107 transitions. [2021-05-02 20:52:39,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 20:52:39,553 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 [2021-05-02 20:52:39,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:39,554 INFO L225 Difference]: With dead ends: 93 [2021-05-02 20:52:39,554 INFO L226 Difference]: Without dead ends: 93 [2021-05-02 20:52:39,554 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 [2021-05-02 20:52:39,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-05-02 20:52:39,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2021-05-02 20:52:39,557 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) [2021-05-02 20:52:39,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 106 transitions. [2021-05-02 20:52:39,558 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 106 transitions. Word has length 54 [2021-05-02 20:52:39,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:39,558 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 106 transitions. [2021-05-02 20:52:39,558 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) [2021-05-02 20:52:39,558 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 106 transitions. [2021-05-02 20:52:39,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-02 20:52:39,559 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:39,559 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] [2021-05-02 20:52:39,772 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-02 20:52:39,773 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:39,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:39,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1448522011, now seen corresponding path program 1 times [2021-05-02 20:52:39,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:39,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082658764] [2021-05-02 20:52:39,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:39,779 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:52:39,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1448082047] [2021-05-02 20:52:39,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:52:39,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:39,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 20:52:39,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:52:39,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:39,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:39,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:39,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:39,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:39,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:39,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:39,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:39,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:39,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:39,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:39,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:40,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:40,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:40,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:40,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:40,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:40,119 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-02 20:52:40,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:52:40,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082658764] [2021-05-02 20:52:40,119 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:52:40,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448082047] [2021-05-02 20:52:40,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448082047] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:52:40,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:52:40,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:52:40,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123482588] [2021-05-02 20:52:40,120 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:52:40,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:52:40,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:52:40,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:52:40,120 INFO L87 Difference]: Start difference. First operand 92 states and 106 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-02 20:52:40,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:40,319 INFO L93 Difference]: Finished difference Result 96 states and 109 transitions. [2021-05-02 20:52:40,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:52:40,320 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 54 [2021-05-02 20:52:40,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:40,322 INFO L225 Difference]: With dead ends: 96 [2021-05-02 20:52:40,322 INFO L226 Difference]: Without dead ends: 90 [2021-05-02 20:52:40,322 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 141.9ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-05-02 20:52:40,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-05-02 20:52:40,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2021-05-02 20:52:40,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 58 states have (on average 1.1206896551724137) internal successors, (65), 59 states have internal predecessors, (65), 18 states have call successors, (18), 14 states have call predecessors, (18), 13 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 20:52:40,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 99 transitions. [2021-05-02 20:52:40,334 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 99 transitions. Word has length 54 [2021-05-02 20:52:40,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:40,335 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 99 transitions. [2021-05-02 20:52:40,335 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-02 20:52:40,335 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 99 transitions. [2021-05-02 20:52:40,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-02 20:52:40,338 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:40,338 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] [2021-05-02 20:52:40,548 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-02 20:52:40,549 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:40,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:40,549 INFO L82 PathProgramCache]: Analyzing trace with hash -161321978, now seen corresponding path program 2 times [2021-05-02 20:52:40,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:40,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186981303] [2021-05-02 20:52:40,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:40,555 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:52:40,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [564066216] [2021-05-02 20:52:40,555 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 [2021-05-02 20:52:40,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-05-02 20:52:40,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:52:40,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 20:52:40,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:52:40,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:40,675 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-05-02 20:52:40,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:52:40,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186981303] [2021-05-02 20:52:40,675 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:52:40,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564066216] [2021-05-02 20:52:40,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564066216] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:52:40,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:52:40,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-02 20:52:40,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708881269] [2021-05-02 20:52:40,676 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 20:52:40,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:52:40,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 20:52:40,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:52:40,677 INFO L87 Difference]: Start difference. First operand 90 states and 99 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:52:40,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:40,727 INFO L93 Difference]: Finished difference Result 102 states and 116 transitions. [2021-05-02 20:52:40,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 20:52:40,727 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 56 [2021-05-02 20:52:40,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:40,728 INFO L225 Difference]: With dead ends: 102 [2021-05-02 20:52:40,728 INFO L226 Difference]: Without dead ends: 102 [2021-05-02 20:52:40,728 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 25.6ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:52:40,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-05-02 20:52:40,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2021-05-02 20:52:40,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 65 states have (on average 1.1538461538461537) internal successors, (75), 67 states have internal predecessors, (75), 21 states have call successors, (21), 15 states have call predecessors, (21), 14 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-02 20:52:40,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 115 transitions. [2021-05-02 20:52:40,731 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 115 transitions. Word has length 56 [2021-05-02 20:52:40,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:40,732 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 115 transitions. [2021-05-02 20:52:40,732 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:52:40,732 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 115 transitions. [2021-05-02 20:52:40,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-02 20:52:40,732 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:40,732 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] [2021-05-02 20:52:40,947 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:52:40,948 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:40,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:40,948 INFO L82 PathProgramCache]: Analyzing trace with hash 1294763379, now seen corresponding path program 1 times [2021-05-02 20:52:40,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:40,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487517663] [2021-05-02 20:52:40,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:40,953 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:52:40,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [139493557] [2021-05-02 20:52:40,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:52:40,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:40,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 20:52:40,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:52:41,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:41,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:41,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:41,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:41,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:41,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:41,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:41,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:41,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:41,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:41,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:41,079 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 36 proven. 46 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-05-02 20:52:41,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:52:41,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487517663] [2021-05-02 20:52:41,079 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:52:41,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139493557] [2021-05-02 20:52:41,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139493557] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:52:41,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:52:41,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 20:52:41,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952879727] [2021-05-02 20:52:41,081 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:52:41,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:52:41,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:52:41,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:52:41,082 INFO L87 Difference]: Start difference. First operand 101 states and 115 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) [2021-05-02 20:52:41,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:41,118 INFO L93 Difference]: Finished difference Result 103 states and 117 transitions. [2021-05-02 20:52:41,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:52:41,118 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 [2021-05-02 20:52:41,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:41,119 INFO L225 Difference]: With dead ends: 103 [2021-05-02 20:52:41,120 INFO L226 Difference]: Without dead ends: 103 [2021-05-02 20:52:41,120 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 16.1ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:52:41,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-05-02 20:52:41,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2021-05-02 20:52:41,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 67 states have (on average 1.1492537313432836) internal successors, (77), 69 states have internal predecessors, (77), 21 states have call successors, (21), 15 states have call predecessors, (21), 14 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-02 20:52:41,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 117 transitions. [2021-05-02 20:52:41,123 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 117 transitions. Word has length 61 [2021-05-02 20:52:41,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:41,123 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 117 transitions. [2021-05-02 20:52:41,123 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) [2021-05-02 20:52:41,123 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 117 transitions. [2021-05-02 20:52:41,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-02 20:52:41,123 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:41,123 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] [2021-05-02 20:52:41,336 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:52:41,337 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:41,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:41,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1774996485, now seen corresponding path program 2 times [2021-05-02 20:52:41,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:41,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676958118] [2021-05-02 20:52:41,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:41,342 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:52:41,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [435251401] [2021-05-02 20:52:41,343 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 [2021-05-02 20:52:41,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:52:41,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:52:41,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-02 20:52:41,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:52:41,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:41,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:41,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:41,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:41,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:41,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:41,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:41,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:41,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:41,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:41,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:41,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:41,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:41,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:41,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:41,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:41,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:41,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:41,691 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 43 proven. 34 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-05-02 20:52:41,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:52:41,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676958118] [2021-05-02 20:52:41,691 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:52:41,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435251401] [2021-05-02 20:52:41,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435251401] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:52:41,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:52:41,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 20:52:41,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789331357] [2021-05-02 20:52:41,692 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 20:52:41,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:52:41,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 20:52:41,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-05-02 20:52:41,693 INFO L87 Difference]: Start difference. First operand 103 states and 117 transitions. Second operand has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 10 states have internal predecessors, (24), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2021-05-02 20:52:41,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:41,974 INFO L93 Difference]: Finished difference Result 138 states and 168 transitions. [2021-05-02 20:52:41,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 20:52:41,974 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 10 states have internal predecessors, (24), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) Word has length 64 [2021-05-02 20:52:41,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:41,976 INFO L225 Difference]: With dead ends: 138 [2021-05-02 20:52:41,976 INFO L226 Difference]: Without dead ends: 131 [2021-05-02 20:52:41,976 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 130.9ms TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-05-02 20:52:41,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-05-02 20:52:41,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 125. [2021-05-02 20:52:41,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 80 states have (on average 1.175) internal successors, (94), 83 states have internal predecessors, (94), 28 states have call successors, (28), 17 states have call predecessors, (28), 16 states have return successors, (26), 24 states have call predecessors, (26), 26 states have call successors, (26) [2021-05-02 20:52:41,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 148 transitions. [2021-05-02 20:52:41,980 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 148 transitions. Word has length 64 [2021-05-02 20:52:41,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:41,980 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 148 transitions. [2021-05-02 20:52:41,980 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 10 states have internal predecessors, (24), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2021-05-02 20:52:41,981 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 148 transitions. [2021-05-02 20:52:41,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-02 20:52:41,981 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:41,981 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] [2021-05-02 20:52:42,194 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 20:52:42,194 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:42,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:42,195 INFO L82 PathProgramCache]: Analyzing trace with hash 112143503, now seen corresponding path program 1 times [2021-05-02 20:52:42,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:42,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168960362] [2021-05-02 20:52:42,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:42,203 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:52:42,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [650878418] [2021-05-02 20:52:42,204 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 [2021-05-02 20:52:42,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:42,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 20:52:42,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:52:42,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:42,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:42,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:42,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:42,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:42,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:42,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:42,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:42,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:42,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:42,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:42,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:42,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:42,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:42,373 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 16 proven. 92 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 20:52:42,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:52:42,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168960362] [2021-05-02 20:52:42,374 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:52:42,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650878418] [2021-05-02 20:52:42,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650878418] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:52:42,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:52:42,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 20:52:42,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114004776] [2021-05-02 20:52:42,374 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 20:52:42,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:52:42,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 20:52:42,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:52:42,375 INFO L87 Difference]: Start difference. First operand 125 states and 148 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) [2021-05-02 20:52:42,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:42,437 INFO L93 Difference]: Finished difference Result 138 states and 158 transitions. [2021-05-02 20:52:42,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:52:42,438 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 [2021-05-02 20:52:42,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:42,440 INFO L225 Difference]: With dead ends: 138 [2021-05-02 20:52:42,440 INFO L226 Difference]: Without dead ends: 138 [2021-05-02 20:52:42,441 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 18.9ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:52:42,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-05-02 20:52:42,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2021-05-02 20:52:42,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 90 states have (on average 1.1444444444444444) internal successors, (103), 92 states have internal predecessors, (103), 28 states have call successors, (28), 19 states have call predecessors, (28), 18 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2021-05-02 20:52:42,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 157 transitions. [2021-05-02 20:52:42,447 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 157 transitions. Word has length 68 [2021-05-02 20:52:42,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:42,447 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 157 transitions. [2021-05-02 20:52:42,447 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) [2021-05-02 20:52:42,447 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 157 transitions. [2021-05-02 20:52:42,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-02 20:52:42,448 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:42,448 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] [2021-05-02 20:52:42,653 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-02 20:52:42,653 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:42,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:42,653 INFO L82 PathProgramCache]: Analyzing trace with hash 113245770, now seen corresponding path program 1 times [2021-05-02 20:52:42,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:42,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247905085] [2021-05-02 20:52:42,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:42,658 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:52:42,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [462120531] [2021-05-02 20:52:42,658 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 [2021-05-02 20:52:42,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:42,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 20:52:42,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:52:42,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:42,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:42,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:42,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:42,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:42,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:42,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:42,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:42,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:42,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:42,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:42,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:42,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:42,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:42,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:42,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:42,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:42,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:42,972 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-05-02 20:52:42,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:52:42,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247905085] [2021-05-02 20:52:42,973 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:52:42,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462120531] [2021-05-02 20:52:42,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462120531] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:52:42,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:52:42,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:52:42,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176096968] [2021-05-02 20:52:42,973 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:52:42,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:52:42,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:52:42,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:52:42,974 INFO L87 Difference]: Start difference. First operand 137 states and 157 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 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) [2021-05-02 20:52:43,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:43,146 INFO L93 Difference]: Finished difference Result 149 states and 174 transitions. [2021-05-02 20:52:43,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 20:52:43,147 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 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 [2021-05-02 20:52:43,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:43,148 INFO L225 Difference]: With dead ends: 149 [2021-05-02 20:52:43,148 INFO L226 Difference]: Without dead ends: 149 [2021-05-02 20:52:43,148 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 107.2ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-05-02 20:52:43,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-05-02 20:52:43,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 147. [2021-05-02 20:52:43,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 97 states have (on average 1.1649484536082475) internal successors, (113), 99 states have internal predecessors, (113), 30 states have call successors, (30), 20 states have call predecessors, (30), 19 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2021-05-02 20:52:43,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 171 transitions. [2021-05-02 20:52:43,156 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 171 transitions. Word has length 68 [2021-05-02 20:52:43,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:43,156 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 171 transitions. [2021-05-02 20:52:43,156 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 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) [2021-05-02 20:52:43,157 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 171 transitions. [2021-05-02 20:52:43,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-02 20:52:43,157 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:43,157 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 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] [2021-05-02 20:52:43,371 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 20:52:43,372 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:43,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:43,372 INFO L82 PathProgramCache]: Analyzing trace with hash -2039825082, now seen corresponding path program 2 times [2021-05-02 20:52:43,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:43,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488856595] [2021-05-02 20:52:43,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:43,377 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:52:43,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1691922465] [2021-05-02 20:52:43,377 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 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 [2021-05-02 20:52:43,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:52:43,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:52:43,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-02 20:52:43,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:52:43,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:43,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:43,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:43,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:43,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:43,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:43,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:43,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:43,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:43,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:43,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:43,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:43,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:43,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:43,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:43,733 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 46 proven. 24 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-05-02 20:52:43,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:52:43,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488856595] [2021-05-02 20:52:43,733 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:52:43,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691922465] [2021-05-02 20:52:43,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691922465] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:52:43,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:52:43,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:52:43,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848790973] [2021-05-02 20:52:43,735 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:52:43,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:52:43,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:52:43,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:52:43,735 INFO L87 Difference]: Start difference. First operand 147 states and 171 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 6 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2021-05-02 20:52:43,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:52:43,943 INFO L93 Difference]: Finished difference Result 150 states and 171 transitions. [2021-05-02 20:52:43,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:52:43,944 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 6 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) Word has length 73 [2021-05-02 20:52:43,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:52:43,944 INFO L225 Difference]: With dead ends: 150 [2021-05-02 20:52:43,944 INFO L226 Difference]: Without dead ends: 149 [2021-05-02 20:52:43,945 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 120.4ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:52:43,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-05-02 20:52:43,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2021-05-02 20:52:43,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 97 states have (on average 1.134020618556701) internal successors, (110), 100 states have internal predecessors, (110), 31 states have call successors, (31), 21 states have call predecessors, (31), 20 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2021-05-02 20:52:43,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 169 transitions. [2021-05-02 20:52:43,949 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 169 transitions. Word has length 73 [2021-05-02 20:52:43,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:52:43,949 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 169 transitions. [2021-05-02 20:52:43,949 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 6 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2021-05-02 20:52:43,949 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 169 transitions. [2021-05-02 20:52:43,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-02 20:52:43,950 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:52:43,950 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] [2021-05-02 20:52:44,166 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:52:44,166 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:52:44,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:52:44,167 INFO L82 PathProgramCache]: Analyzing trace with hash -742748636, now seen corresponding path program 1 times [2021-05-02 20:52:44,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:52:44,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444254408] [2021-05-02 20:52:44,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:52:44,178 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:52:44,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [403381016] [2021-05-02 20:52:44,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-05-02 20:52:44,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:52:44,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-02 20:52:44,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:52:44,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:44,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:44,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:44,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:44,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:44,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:44,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:44,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:44,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:44,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:44,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:44,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:44,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:44,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:44,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:44,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:44,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:44,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:44,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:44,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:44,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:44,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:44,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:44,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:44,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:44,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:44,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:44,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:44,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:56,750 WARN L205 SmtUtils]: Spent 11.94 s on a formula simplification. DAG size of input: 89 DAG size of output: 80 [2021-05-02 20:52:56,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:56,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:56,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:56,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:56,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:57,326 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2021-05-02 20:52:57,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:57,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:57,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:57,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:57,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:57,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:57,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:57,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:57,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:57,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:57,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:57,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:57,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:57,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:57,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:57,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:57,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:57,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:57,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:57,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:57,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:57,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:52:58,650 WARN L159 QuantifierPusher]: Ignoring assumption.