/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_unwindbound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 21:56:15,331 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 21:56:15,333 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 21:56:15,362 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 21:56:15,362 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 21:56:15,365 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 21:56:15,367 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 21:56:15,371 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 21:56:15,372 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 21:56:15,375 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 21:56:15,376 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 21:56:15,377 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 21:56:15,377 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 21:56:15,377 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 21:56:15,378 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 21:56:15,379 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 21:56:15,379 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 21:56:15,380 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 21:56:15,381 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 21:56:15,382 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 21:56:15,382 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 21:56:15,385 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 21:56:15,386 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 21:56:15,386 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 21:56:15,388 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 21:56:15,393 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 21:56:15,394 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 21:56:15,394 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 21:56:15,395 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 21:56:15,402 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 21:56:15,402 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 21:56:15,403 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 21:56:15,403 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 21:56:15,403 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 21:56:15,403 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 21:56:15,403 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 21:56:15,403 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 21:56:15,404 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 21:56:15,404 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 21:56:15,404 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 21:56:15,404 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 21:56:15,404 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 21:56:15,404 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 21:56:15,404 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 21:56:15,405 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 21:56:15,405 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 21:56:15,405 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 21:56:15,405 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 21:56:15,405 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 21:56:15,405 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 21:56:15,406 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 21:56:15,406 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 21:56:15,611 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 21:56:15,633 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 21:56:15,634 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 21:56:15,635 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 21:56:15,635 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 21:56:15,636 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_unwindbound50.c [2021-05-02 21:56:15,681 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/383177dfd/9f28a7393480477d8459a58e4d0d88c5/FLAG9db4c68be [2021-05-02 21:56:16,003 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 21:56:16,004 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_unwindbound50.c [2021-05-02 21:56:16,008 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/383177dfd/9f28a7393480477d8459a58e4d0d88c5/FLAG9db4c68be [2021-05-02 21:56:16,023 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/383177dfd/9f28a7393480477d8459a58e4d0d88c5 [2021-05-02 21:56:16,025 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 21:56:16,026 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 21:56:16,030 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 21:56:16,030 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 21:56:16,033 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 21:56:16,033 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 09:56:16" (1/1) ... [2021-05-02 21:56:16,034 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74108724 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:56:16, skipping insertion in model container [2021-05-02 21:56:16,034 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 09:56:16" (1/1) ... [2021-05-02 21:56:16,038 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 21:56:16,048 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 21:56:16,161 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_unwindbound50.c[537,550] [2021-05-02 21:56:16,172 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 21:56:16,178 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 21:56:16,187 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_unwindbound50.c[537,550] [2021-05-02 21:56:16,198 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 21:56:16,208 INFO L208 MainTranslator]: Completed translation [2021-05-02 21:56:16,209 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:56:16 WrapperNode [2021-05-02 21:56:16,209 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 21:56:16,230 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 21:56:16,230 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 21:56:16,230 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 21:56:16,240 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:56:16" (1/1) ... [2021-05-02 21:56:16,240 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:56:16" (1/1) ... [2021-05-02 21:56:16,255 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:56:16" (1/1) ... [2021-05-02 21:56:16,256 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:56:16" (1/1) ... [2021-05-02 21:56:16,268 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:56:16" (1/1) ... [2021-05-02 21:56:16,272 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:56:16" (1/1) ... [2021-05-02 21:56:16,276 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:56:16" (1/1) ... [2021-05-02 21:56:16,279 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 21:56:16,280 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 21:56:16,280 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 21:56:16,280 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 21:56:16,281 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:56:16" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 21:56:16,365 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 21:56:16,365 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 21:56:16,365 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 21:56:16,365 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 21:56:16,365 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 21:56:16,365 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 21:56:16,365 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 21:56:16,366 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 21:56:16,366 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 21:56:16,366 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 21:56:16,366 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 21:56:16,366 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 21:56:16,366 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 21:56:16,366 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 21:56:16,367 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 21:56:16,367 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 21:56:16,367 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 21:56:16,367 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 21:56:16,367 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 21:56:16,368 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 21:56:16,608 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 21:56:16,608 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 21:56:16,609 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 09:56:16 BoogieIcfgContainer [2021-05-02 21:56:16,609 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 21:56:16,609 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 21:56:16,610 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 21:56:16,610 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 21:56:16,612 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 09:56:16" (1/1) ... [2021-05-02 21:56:16,623 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 09:56:16 BasicIcfg [2021-05-02 21:56:16,623 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 21:56:16,624 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 21:56:16,624 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 21:56:16,626 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 21:56:16,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 09:56:16" (1/4) ... [2021-05-02 21:56:16,626 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@159428c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 09:56:16, skipping insertion in model container [2021-05-02 21:56:16,627 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:56:16" (2/4) ... [2021-05-02 21:56:16,627 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@159428c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 09:56:16, skipping insertion in model container [2021-05-02 21:56:16,627 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 09:56:16" (3/4) ... [2021-05-02 21:56:16,627 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@159428c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 09:56:16, skipping insertion in model container [2021-05-02 21:56:16,627 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 09:56:16" (4/4) ... [2021-05-02 21:56:16,628 INFO L111 eAbstractionObserver]: Analyzing ICFG prodbin-ll_unwindbound50.cJordan [2021-05-02 21:56:16,631 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 21:56:16,633 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 21:56:16,645 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 21:56:16,665 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 21:56:16,666 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 21:56:16,666 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 21:56:16,666 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 21:56:16,666 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 21:56:16,666 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 21:56:16,666 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 21:56:16,666 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 21:56:16,677 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 21:56:16,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 21:56:16,682 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:56:16,683 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 21:56:16,683 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:56:16,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:56:16,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1957529129, now seen corresponding path program 1 times [2021-05-02 21:56:16,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:56:16,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659398818] [2021-05-02 21:56:16,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:56:16,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:56:16,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 21:56:16,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:56:16,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 21:56:16,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:56:16,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 21:56:16,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:56:16,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659398818] [2021-05-02 21:56:16,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659398818] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 21:56:16,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 21:56:16,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 21:56:16,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543504913] [2021-05-02 21:56:16,936 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 21:56:16,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:56:16,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 21:56:16,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 21:56:16,946 INFO L87 Difference]: Start difference. First operand has 30 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 21:56:17,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:56:17,021 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2021-05-02 21:56:17,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 21:56:17,023 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-02 21:56:17,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:56:17,028 INFO L225 Difference]: With dead ends: 31 [2021-05-02 21:56:17,029 INFO L226 Difference]: Without dead ends: 26 [2021-05-02 21:56:17,029 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 56.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 21:56:17,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-02 21:56:17,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-05-02 21:56:17,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 21:56:17,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-05-02 21:56:17,053 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 17 [2021-05-02 21:56:17,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:56:17,053 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-05-02 21:56:17,053 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 21:56:17,053 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-05-02 21:56:17,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 21:56:17,054 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:56:17,054 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 21:56:17,055 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 21:56:17,055 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:56:17,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:56:17,056 INFO L82 PathProgramCache]: Analyzing trace with hash 583261658, now seen corresponding path program 1 times [2021-05-02 21:56:17,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:56:17,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089233408] [2021-05-02 21:56:17,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:56:17,081 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:56:17,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1390082416] [2021-05-02 21:56:17,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:56:17,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:56:17,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 21:56:17,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:56:17,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:17,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:17,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:17,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:17,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:17,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 21:56:17,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:56:17,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089233408] [2021-05-02 21:56:17,232 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:56:17,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390082416] [2021-05-02 21:56:17,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390082416] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 21:56:17,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 21:56:17,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 21:56:17,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216385150] [2021-05-02 21:56:17,234 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 21:56:17,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:56:17,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 21:56:17,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 21:56:17,234 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 21:56:17,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:56:17,242 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2021-05-02 21:56:17,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 21:56:17,242 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2021-05-02 21:56:17,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:56:17,243 INFO L225 Difference]: With dead ends: 27 [2021-05-02 21:56:17,243 INFO L226 Difference]: Without dead ends: 27 [2021-05-02 21:56:17,243 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.4ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 21:56:17,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-02 21:56:17,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-02 21:56:17,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 21:56:17,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2021-05-02 21:56:17,246 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 18 [2021-05-02 21:56:17,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:56:17,246 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2021-05-02 21:56:17,247 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 21:56:17,247 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2021-05-02 21:56:17,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 21:56:17,247 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:56:17,247 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 21:56:17,457 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 21:56:17,458 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:56:17,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:56:17,458 INFO L82 PathProgramCache]: Analyzing trace with hash 584363925, now seen corresponding path program 1 times [2021-05-02 21:56:17,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:56:17,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53989583] [2021-05-02 21:56:17,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:56:17,467 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:56:17,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [834752060] [2021-05-02 21:56:17,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:56:17,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:56:17,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 21:56:17,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:56:17,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:17,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:17,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 21:56:17,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:56:17,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53989583] [2021-05-02 21:56:17,594 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:56:17,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834752060] [2021-05-02 21:56:17,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834752060] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 21:56:17,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 21:56:17,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 21:56:17,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517456208] [2021-05-02 21:56:17,594 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 21:56:17,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:56:17,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 21:56:17,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 21:56:17,595 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 8 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 21:56:17,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:56:17,671 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2021-05-02 21:56:17,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 21:56:17,672 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-02 21:56:17,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:56:17,672 INFO L225 Difference]: With dead ends: 35 [2021-05-02 21:56:17,672 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 21:56:17,673 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 41.1ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 21:56:17,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 21:56:17,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2021-05-02 21:56:17,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 21:56:17,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2021-05-02 21:56:17,676 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 18 [2021-05-02 21:56:17,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:56:17,676 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2021-05-02 21:56:17,676 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 21:56:17,677 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2021-05-02 21:56:17,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 21:56:17,677 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:56:17,677 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 21:56:17,895 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:56:17,897 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:56:17,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:56:17,898 INFO L82 PathProgramCache]: Analyzing trace with hash 919545147, now seen corresponding path program 1 times [2021-05-02 21:56:17,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:56:17,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296113409] [2021-05-02 21:56:17,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:56:17,906 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:56:17,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [116094453] [2021-05-02 21:56:17,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:56:17,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:56:17,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 21:56:17,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:56:17,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:17,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:17,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:18,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:18,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:18,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:18,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:18,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:18,099 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 21:56:18,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:56:18,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296113409] [2021-05-02 21:56:18,099 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:56:18,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116094453] [2021-05-02 21:56:18,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116094453] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 21:56:18,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 21:56:18,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 21:56:18,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458309787] [2021-05-02 21:56:18,100 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 21:56:18,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:56:18,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 21:56:18,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 21:56:18,100 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 21:56:18,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:56:18,140 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2021-05-02 21:56:18,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 21:56:18,140 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-05-02 21:56:18,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:56:18,141 INFO L225 Difference]: With dead ends: 37 [2021-05-02 21:56:18,141 INFO L226 Difference]: Without dead ends: 37 [2021-05-02 21:56:18,141 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 33.0ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 21:56:18,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-05-02 21:56:18,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-05-02 21:56:18,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 27 states have internal predecessors, (31), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 21:56:18,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2021-05-02 21:56:18,144 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 28 [2021-05-02 21:56:18,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:56:18,145 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2021-05-02 21:56:18,145 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 21:56:18,145 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2021-05-02 21:56:18,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 21:56:18,145 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:56:18,145 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 21:56:18,346 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:56:18,346 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:56:18,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:56:18,347 INFO L82 PathProgramCache]: Analyzing trace with hash 920647414, now seen corresponding path program 1 times [2021-05-02 21:56:18,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:56:18,347 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610971104] [2021-05-02 21:56:18,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:56:18,356 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:56:18,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [706898375] [2021-05-02 21:56:18,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:56:18,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:56:18,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-02 21:56:18,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:56:18,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:18,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:18,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:18,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:18,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:18,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:18,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:18,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:18,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:18,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:18,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:18,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:18,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:18,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:18,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:18,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:18,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:18,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:18,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:18,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:18,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:18,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:18,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:18,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:18,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:18,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:18,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:18,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:18,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:18,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:18,795 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 21:56:18,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:56:18,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610971104] [2021-05-02 21:56:18,796 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:56:18,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706898375] [2021-05-02 21:56:18,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706898375] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 21:56:18,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 21:56:18,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 21:56:18,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69865330] [2021-05-02 21:56:18,796 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 21:56:18,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:56:18,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 21:56:18,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-05-02 21:56:18,798 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 10 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 21:56:21,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:56:21,864 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2021-05-02 21:56:21,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 21:56:21,866 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 10 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2021-05-02 21:56:21,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:56:21,868 INFO L225 Difference]: With dead ends: 49 [2021-05-02 21:56:21,868 INFO L226 Difference]: Without dead ends: 49 [2021-05-02 21:56:21,868 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 108.8ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-05-02 21:56:21,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-02 21:56:21,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2021-05-02 21:56:21,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 32 states have (on average 1.15625) internal successors, (37), 34 states have internal predecessors, (37), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 21:56:21,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2021-05-02 21:56:21,889 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 28 [2021-05-02 21:56:21,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:56:21,889 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2021-05-02 21:56:21,889 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 10 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 21:56:21,889 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2021-05-02 21:56:21,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 21:56:21,890 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:56:21,892 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 21:56:22,096 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:56:22,097 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:56:22,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:56:22,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1631509547, now seen corresponding path program 1 times [2021-05-02 21:56:22,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:56:22,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876857195] [2021-05-02 21:56:22,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:56:22,104 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:56:22,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1062031809] [2021-05-02 21:56:22,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:56:22,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:56:22,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 21:56:22,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:56:22,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:22,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:22,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:22,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:22,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:22,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:22,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:22,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:22,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:22,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:22,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:22,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:22,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:22,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:22,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:22,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:22,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:22,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:22,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:22,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:22,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:22,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:22,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:22,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:22,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:22,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:22,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:22,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:22,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:22,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:22,362 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 21:56:22,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:56:22,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876857195] [2021-05-02 21:56:22,365 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:56:22,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062031809] [2021-05-02 21:56:22,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062031809] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 21:56:22,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 21:56:22,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 21:56:22,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680434566] [2021-05-02 21:56:22,367 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 21:56:22,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:56:22,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 21:56:22,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-02 21:56:22,369 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 21:56:22,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:56:22,455 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2021-05-02 21:56:22,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 21:56:22,456 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2021-05-02 21:56:22,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:56:22,457 INFO L225 Difference]: With dead ends: 53 [2021-05-02 21:56:22,458 INFO L226 Difference]: Without dead ends: 53 [2021-05-02 21:56:22,458 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 69.5ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-02 21:56:22,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-05-02 21:56:22,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2021-05-02 21:56:22,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 38 states have internal predecessors, (41), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 21:56:22,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2021-05-02 21:56:22,467 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 28 [2021-05-02 21:56:22,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:56:22,469 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2021-05-02 21:56:22,469 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 21:56:22,470 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2021-05-02 21:56:22,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 21:56:22,471 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:56:22,471 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 21:56:22,684 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:56:22,685 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:56:22,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:56:22,685 INFO L82 PathProgramCache]: Analyzing trace with hash -357510123, now seen corresponding path program 1 times [2021-05-02 21:56:22,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:56:22,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213266764] [2021-05-02 21:56:22,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:56:22,692 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:56:22,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1051169090] [2021-05-02 21:56:22,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:56:22,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:56:22,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 21:56:22,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:56:22,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:22,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:22,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:22,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:22,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:22,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:22,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:22,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:22,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:22,899 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 21:56:22,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:56:22,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213266764] [2021-05-02 21:56:22,899 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:56:22,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051169090] [2021-05-02 21:56:22,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051169090] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 21:56:22,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 21:56:22,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 21:56:22,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488727232] [2021-05-02 21:56:22,900 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 21:56:22,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:56:22,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 21:56:22,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-05-02 21:56:22,900 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 21:56:25,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:56:25,073 INFO L93 Difference]: Finished difference Result 57 states and 60 transitions. [2021-05-02 21:56:25,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 21:56:25,074 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 34 [2021-05-02 21:56:25,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:56:25,074 INFO L225 Difference]: With dead ends: 57 [2021-05-02 21:56:25,075 INFO L226 Difference]: Without dead ends: 52 [2021-05-02 21:56:25,075 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 188.7ms TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-05-02 21:56:25,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-02 21:56:25,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 42. [2021-05-02 21:56:25,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 31 states have internal predecessors, (33), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 21:56:25,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2021-05-02 21:56:25,077 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 34 [2021-05-02 21:56:25,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:56:25,077 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2021-05-02 21:56:25,077 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 21:56:25,078 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2021-05-02 21:56:25,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 21:56:25,078 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:56:25,078 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 21:56:25,281 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:56:25,281 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:56:25,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:56:25,281 INFO L82 PathProgramCache]: Analyzing trace with hash -782932132, now seen corresponding path program 2 times [2021-05-02 21:56:25,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:56:25,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845119351] [2021-05-02 21:56:25,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:56:25,288 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:56:25,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [481280427] [2021-05-02 21:56:25,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:56:25,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 21:56:25,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 21:56:25,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 21:56:25,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:56:25,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:25,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:25,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:25,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:25,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:25,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:25,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:25,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:25,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:25,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:25,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:25,416 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 21:56:25,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:56:25,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845119351] [2021-05-02 21:56:25,416 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:56:25,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481280427] [2021-05-02 21:56:25,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481280427] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 21:56:25,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 21:56:25,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 21:56:25,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518596946] [2021-05-02 21:56:25,417 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 21:56:25,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:56:25,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 21:56:25,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 21:56:25,417 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 21:56:25,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:56:25,449 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2021-05-02 21:56:25,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 21:56:25,450 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Word has length 38 [2021-05-02 21:56:25,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:56:25,450 INFO L225 Difference]: With dead ends: 47 [2021-05-02 21:56:25,450 INFO L226 Difference]: Without dead ends: 47 [2021-05-02 21:56:25,451 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 19.2ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-02 21:56:25,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-02 21:56:25,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-05-02 21:56:25,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 35 states have internal predecessors, (39), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 21:56:25,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2021-05-02 21:56:25,453 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 38 [2021-05-02 21:56:25,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:56:25,453 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2021-05-02 21:56:25,453 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 21:56:25,453 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2021-05-02 21:56:25,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 21:56:25,454 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:56:25,454 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 21:56:25,660 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:56:25,661 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:56:25,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:56:25,661 INFO L82 PathProgramCache]: Analyzing trace with hash -781829865, now seen corresponding path program 2 times [2021-05-02 21:56:25,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:56:25,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390231735] [2021-05-02 21:56:25,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:56:25,667 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:56:25,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [984590800] [2021-05-02 21:56:25,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:56:25,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 21:56:25,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 21:56:25,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 48 conjunts are in the unsatisfiable core [2021-05-02 21:56:25,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:56:25,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:25,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:25,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:25,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:25,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:25,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:32,131 WARN L205 SmtUtils]: Spent 4.02 s on a formula simplification that was a NOOP. DAG size: 22 [2021-05-02 21:56:39,696 WARN L205 SmtUtils]: Spent 6.03 s on a formula simplification that was a NOOP. DAG size: 25 [2021-05-02 21:56:51,810 WARN L205 SmtUtils]: Spent 12.07 s on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-05-02 21:56:59,899 WARN L205 SmtUtils]: Spent 8.06 s on a formula simplification. DAG size of input: 45 DAG size of output: 32 [2021-05-02 21:56:59,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:59,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:59,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:59,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:59,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:59,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:59,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:59,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:59,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:59,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:56:59,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:57:00,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:57:00,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:57:00,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:57:00,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:57:00,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:57:00,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:57:00,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:57:00,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:57:00,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:57:00,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:57:00,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:57:00,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:57:00,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:57:00,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:57:00,094 WARN L159 QuantifierPusher]: Ignoring assumption.