/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/hard-ll.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 19:18:50,864 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 19:18:50,865 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 19:18:50,897 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 19:18:50,897 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 19:18:50,898 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 19:18:50,899 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 19:18:50,900 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 19:18:50,901 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 19:18:50,902 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 19:18:50,902 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 19:18:50,903 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 19:18:50,903 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 19:18:50,904 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 19:18:50,905 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 19:18:50,905 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 19:18:50,906 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 19:18:50,906 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 19:18:50,907 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 19:18:50,921 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 19:18:50,922 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 19:18:50,923 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 19:18:50,924 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 19:18:50,925 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 19:18:50,926 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 19:18:50,932 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 19:18:50,932 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 19:18:50,933 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 19:18:50,937 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 19:18:50,957 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 19:18:50,957 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 19:18:50,958 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 19:18:50,958 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 19:18:50,958 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 19:18:50,959 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 19:18:50,959 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 19:18:50,959 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 19:18:50,959 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 19:18:50,959 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 19:18:50,959 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 19:18:50,959 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 19:18:50,959 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 19:18:50,959 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 19:18:50,960 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 19:18:50,960 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 19:18:50,960 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 19:18:50,960 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 19:18:50,960 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 19:18:50,960 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 19:18:50,960 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 19:18:50,961 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 19:18:50,961 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 19:18:51,220 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 19:18:51,237 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 19:18:51,238 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 19:18:51,239 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 19:18:51,240 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 19:18:51,241 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/hard-ll.c [2021-05-02 19:18:51,294 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1920112e4/deef8724d25f4603bb44a5d35a9a9dde/FLAG5b7689410 [2021-05-02 19:18:51,656 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 19:18:51,657 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/hard-ll.c [2021-05-02 19:18:51,661 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1920112e4/deef8724d25f4603bb44a5d35a9a9dde/FLAG5b7689410 [2021-05-02 19:18:52,073 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1920112e4/deef8724d25f4603bb44a5d35a9a9dde [2021-05-02 19:18:52,074 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 19:18:52,075 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 19:18:52,076 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 19:18:52,076 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 19:18:52,081 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 19:18:52,081 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 07:18:52" (1/1) ... [2021-05-02 19:18:52,082 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f6e25dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:18:52, skipping insertion in model container [2021-05-02 19:18:52,082 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 07:18:52" (1/1) ... [2021-05-02 19:18:52,088 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 19:18:52,098 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 19:18:52,195 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/hard-ll.c[546,559] [2021-05-02 19:18:52,207 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 19:18:52,213 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 19:18:52,222 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/hard-ll.c[546,559] [2021-05-02 19:18:52,227 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 19:18:52,238 INFO L208 MainTranslator]: Completed translation [2021-05-02 19:18:52,239 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:18:52 WrapperNode [2021-05-02 19:18:52,239 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 19:18:52,240 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 19:18:52,240 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 19:18:52,240 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 19:18:52,255 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:18:52" (1/1) ... [2021-05-02 19:18:52,261 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:18:52" (1/1) ... [2021-05-02 19:18:52,275 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:18:52" (1/1) ... [2021-05-02 19:18:52,275 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:18:52" (1/1) ... [2021-05-02 19:18:52,279 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:18:52" (1/1) ... [2021-05-02 19:18:52,295 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:18:52" (1/1) ... [2021-05-02 19:18:52,296 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:18:52" (1/1) ... [2021-05-02 19:18:52,299 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 19:18:52,299 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 19:18:52,299 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 19:18:52,299 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 19:18:52,300 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:18:52" (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 19:18:52,359 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 19:18:52,359 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 19:18:52,359 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 19:18:52,359 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 19:18:52,359 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 19:18:52,359 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 19:18:52,359 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 19:18:52,359 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 19:18:52,359 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 19:18:52,359 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 19:18:52,360 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-02 19:18:52,360 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 19:18:52,360 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 19:18:52,360 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 19:18:52,360 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 19:18:52,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 19:18:52,360 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 19:18:52,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 19:18:52,360 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 19:18:52,360 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 19:18:52,570 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 19:18:52,570 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 19:18:52,571 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:18:52 BoogieIcfgContainer [2021-05-02 19:18:52,571 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 19:18:52,572 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 19:18:52,572 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 19:18:52,572 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 19:18:52,574 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:18:52" (1/1) ... [2021-05-02 19:18:52,605 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 07:18:52 BasicIcfg [2021-05-02 19:18:52,606 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 19:18:52,607 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 19:18:52,607 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 19:18:52,608 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 19:18:52,608 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 07:18:52" (1/4) ... [2021-05-02 19:18:52,609 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f266bbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 07:18:52, skipping insertion in model container [2021-05-02 19:18:52,609 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:18:52" (2/4) ... [2021-05-02 19:18:52,609 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f266bbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 07:18:52, skipping insertion in model container [2021-05-02 19:18:52,609 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:18:52" (3/4) ... [2021-05-02 19:18:52,610 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f266bbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 07:18:52, skipping insertion in model container [2021-05-02 19:18:52,610 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 07:18:52" (4/4) ... [2021-05-02 19:18:52,610 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-ll.cJordan [2021-05-02 19:18:52,634 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 19:18:52,637 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 19:18:52,647 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 19:18:52,659 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 19:18:52,660 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 19:18:52,660 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 19:18:52,660 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 19:18:52,660 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 19:18:52,660 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 19:18:52,660 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 19:18:52,660 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 19:18:52,668 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 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 19:18:52,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 19:18:52,673 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:18:52,673 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 19:18:52,674 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:18:52,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:18:52,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1625753047, now seen corresponding path program 1 times [2021-05-02 19:18:52,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:18:52,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122053956] [2021-05-02 19:18:52,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:18:52,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:18:52,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:18:52,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:18:52,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 19:18:52,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:18:52,850 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 19:18:52,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:18:52,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122053956] [2021-05-02 19:18:52,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122053956] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:18:52,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:18:52,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 19:18:52,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639368461] [2021-05-02 19:18:52,855 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 19:18:52,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:18:52,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 19:18:52,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 19:18:52,867 INFO L87 Difference]: Start difference. First operand has 35 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 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 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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 19:18:52,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:18:52,947 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2021-05-02 19:18:52,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 19:18:52,949 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), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-02 19:18:52,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:18:52,955 INFO L225 Difference]: With dead ends: 35 [2021-05-02 19:18:52,955 INFO L226 Difference]: Without dead ends: 30 [2021-05-02 19:18:52,956 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 49.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 19:18:52,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-05-02 19:18:53,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-05-02 19:18:53,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 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 19:18:53,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2021-05-02 19:18:53,009 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 17 [2021-05-02 19:18:53,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:18:53,009 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2021-05-02 19:18:53,010 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), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 19:18:53,010 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2021-05-02 19:18:53,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 19:18:53,011 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:18:53,011 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 19:18:53,011 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 19:18:53,011 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:18:53,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:18:53,012 INFO L82 PathProgramCache]: Analyzing trace with hash 861759786, now seen corresponding path program 1 times [2021-05-02 19:18:53,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:18:53,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145236798] [2021-05-02 19:18:53,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:18:53,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:18:53,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:18:53,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:18:53,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 19:18:53,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:18:53,155 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 19:18:53,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:18:53,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145236798] [2021-05-02 19:18:53,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145236798] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:18:53,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:18:53,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 19:18:53,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796461186] [2021-05-02 19:18:53,158 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 19:18:53,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:18:53,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 19:18:53,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 19:18:53,160 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 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 19:18:53,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:18:53,409 INFO L93 Difference]: Finished difference Result 41 states and 53 transitions. [2021-05-02 19:18:53,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 19:18:53,409 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 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 19:18:53,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:18:53,411 INFO L225 Difference]: With dead ends: 41 [2021-05-02 19:18:53,411 INFO L226 Difference]: Without dead ends: 41 [2021-05-02 19:18:53,412 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 116.7ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:18:53,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-02 19:18:53,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 34. [2021-05-02 19:18:53,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 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 19:18:53,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2021-05-02 19:18:53,424 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 17 [2021-05-02 19:18:53,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:18:53,425 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2021-05-02 19:18:53,425 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 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 19:18:53,425 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2021-05-02 19:18:53,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 19:18:53,426 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:18:53,427 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] [2021-05-02 19:18:53,429 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 19:18:53,429 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:18:53,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:18:53,430 INFO L82 PathProgramCache]: Analyzing trace with hash 325569287, now seen corresponding path program 1 times [2021-05-02 19:18:53,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:18:53,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978447967] [2021-05-02 19:18:53,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:18:53,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:18:53,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:18:53,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:18:53,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 19:18:53,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:18:53,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-05-02 19:18:53,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:18:53,541 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 19:18:53,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:18:53,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978447967] [2021-05-02 19:18:53,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978447967] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:18:53,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:18:53,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 19:18:53,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537301526] [2021-05-02 19:18:53,542 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 19:18:53,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:18:53,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 19:18:53,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 19:18:53,543 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 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 19:18:53,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:18:53,782 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2021-05-02 19:18:53,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 19:18:53,783 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 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 22 [2021-05-02 19:18:53,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:18:53,784 INFO L225 Difference]: With dead ends: 45 [2021-05-02 19:18:53,785 INFO L226 Difference]: Without dead ends: 45 [2021-05-02 19:18:53,785 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 130.5ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:18:53,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-02 19:18:53,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 38. [2021-05-02 19:18:53,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 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 19:18:53,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2021-05-02 19:18:53,795 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 22 [2021-05-02 19:18:53,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:18:53,795 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2021-05-02 19:18:53,795 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 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 19:18:53,796 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2021-05-02 19:18:53,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-02 19:18:53,796 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:18:53,796 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] [2021-05-02 19:18:53,797 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-02 19:18:53,797 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:18:53,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:18:53,798 INFO L82 PathProgramCache]: Analyzing trace with hash -1461652409, now seen corresponding path program 1 times [2021-05-02 19:18:53,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:18:53,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821305261] [2021-05-02 19:18:53,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:18:53,820 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:18:53,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1089187142] [2021-05-02 19:18:53,820 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 19:18:53,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:18:53,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 19:18:53,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:18:53,988 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 19:18:53,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:18:53,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821305261] [2021-05-02 19:18:53,989 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:18:53,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089187142] [2021-05-02 19:18:53,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089187142] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:18:53,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:18:53,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 19:18:53,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741923316] [2021-05-02 19:18:53,990 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 19:18:53,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:18:53,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 19:18:53,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 19:18:53,990 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 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 19:18:54,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:18:54,087 INFO L93 Difference]: Finished difference Result 57 states and 68 transitions. [2021-05-02 19:18:54,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 19:18:54,088 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 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 27 [2021-05-02 19:18:54,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:18:54,089 INFO L225 Difference]: With dead ends: 57 [2021-05-02 19:18:54,089 INFO L226 Difference]: Without dead ends: 56 [2021-05-02 19:18:54,089 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 41.9ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:18:54,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-02 19:18:54,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-05-02 19:18:54,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 32 states have (on average 1.15625) internal successors, (37), 34 states have internal predecessors, (37), 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 19:18:54,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2021-05-02 19:18:54,093 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 27 [2021-05-02 19:18:54,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:18:54,093 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2021-05-02 19:18:54,093 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 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 19:18:54,093 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2021-05-02 19:18:54,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 19:18:54,094 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:18:54,094 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] [2021-05-02 19:18:54,310 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:18:54,310 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:18:54,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:18:54,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1008917278, now seen corresponding path program 1 times [2021-05-02 19:18:54,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:18:54,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476893026] [2021-05-02 19:18:54,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:18:54,319 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:18:54,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1327671732] [2021-05-02 19:18:54,320 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 19:18:54,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:18:54,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 19:18:54,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:18:54,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:54,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:54,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:54,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:54,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:54,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:54,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:54,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:54,572 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-02 19:18:54,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:18:54,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476893026] [2021-05-02 19:18:54,573 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:18:54,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327671732] [2021-05-02 19:18:54,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327671732] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:18:54,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:18:54,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 19:18:54,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044674217] [2021-05-02 19:18:54,577 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 19:18:54,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:18:54,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 19:18:54,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:18:54,577 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 19:18:54,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:18:54,697 INFO L93 Difference]: Finished difference Result 67 states and 81 transitions. [2021-05-02 19:18:54,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 19:18:54,698 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2021-05-02 19:18:54,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:18:54,701 INFO L225 Difference]: With dead ends: 67 [2021-05-02 19:18:54,701 INFO L226 Difference]: Without dead ends: 62 [2021-05-02 19:18:54,701 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 52.1ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-02 19:18:54,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-05-02 19:18:54,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2021-05-02 19:18:54,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 38 states have internal predecessors, (42), 16 states have call successors, (16), 9 states have call predecessors, (16), 8 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 19:18:54,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 72 transitions. [2021-05-02 19:18:54,713 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 72 transitions. Word has length 34 [2021-05-02 19:18:54,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:18:54,713 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 72 transitions. [2021-05-02 19:18:54,714 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 19:18:54,714 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 72 transitions. [2021-05-02 19:18:54,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-02 19:18:54,716 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:18:54,716 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 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 19:18:54,933 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:18:54,933 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:18:54,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:18:54,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1762200840, now seen corresponding path program 1 times [2021-05-02 19:18:54,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:18:54,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153632045] [2021-05-02 19:18:54,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:18:54,953 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:18:54,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1356635531] [2021-05-02 19:18:54,954 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 19:18:54,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:18:54,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-02 19:18:54,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:18:55,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:55,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:55,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:55,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:55,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:55,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:55,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:55,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:55,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:55,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:55,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:55,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:55,174 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 19:18:55,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:18:55,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153632045] [2021-05-02 19:18:55,174 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:18:55,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356635531] [2021-05-02 19:18:55,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356635531] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:18:55,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:18:55,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 19:18:55,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630853611] [2021-05-02 19:18:55,175 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 19:18:55,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:18:55,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 19:18:55,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-02 19:18:55,177 INFO L87 Difference]: Start difference. First operand 61 states and 72 transitions. Second operand has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 9 states have internal predecessors, (19), 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 19:18:55,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:18:55,383 INFO L93 Difference]: Finished difference Result 85 states and 104 transitions. [2021-05-02 19:18:55,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 19:18:55,383 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 9 states have internal predecessors, (19), 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 44 [2021-05-02 19:18:55,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:18:55,388 INFO L225 Difference]: With dead ends: 85 [2021-05-02 19:18:55,388 INFO L226 Difference]: Without dead ends: 79 [2021-05-02 19:18:55,388 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 77.0ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-05-02 19:18:55,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-05-02 19:18:55,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2021-05-02 19:18:55,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 47 states have (on average 1.148936170212766) internal successors, (54), 49 states have internal predecessors, (54), 21 states have call successors, (21), 11 states have call predecessors, (21), 10 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-02 19:18:55,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 94 transitions. [2021-05-02 19:18:55,406 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 94 transitions. Word has length 44 [2021-05-02 19:18:55,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:18:55,407 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 94 transitions. [2021-05-02 19:18:55,407 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 9 states have internal predecessors, (19), 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 19:18:55,407 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 94 transitions. [2021-05-02 19:18:55,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-02 19:18:55,409 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:18:55,409 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 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 19:18:55,610 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:18:55,610 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:18:55,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:18:55,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1665528729, now seen corresponding path program 2 times [2021-05-02 19:18:55,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:18:55,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277882676] [2021-05-02 19:18:55,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:18:55,616 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:18:55,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [329907334] [2021-05-02 19:18:55,616 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 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 19:18:55,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 19:18:55,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:18:55,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-02 19:18:55,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:18:55,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:55,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:55,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:55,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:55,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:55,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:55,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:55,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:55,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:55,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:55,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:55,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:55,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:55,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:55,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:55,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:55,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:55,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:55,924 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 35 proven. 30 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-05-02 19:18:55,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:18:55,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277882676] [2021-05-02 19:18:55,924 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:18:55,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329907334] [2021-05-02 19:18:55,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329907334] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:18:55,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:18:55,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 19:18:55,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543504937] [2021-05-02 19:18:55,925 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 19:18:55,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:18:55,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 19:18:55,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-05-02 19:18:55,926 INFO L87 Difference]: Start difference. First operand 79 states and 94 transitions. Second operand has 14 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 10 states have internal predecessors, (21), 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 19:18:56,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:18:56,216 INFO L93 Difference]: Finished difference Result 108 states and 134 transitions. [2021-05-02 19:18:56,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 19:18:56,216 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 10 states have internal predecessors, (21), 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 61 [2021-05-02 19:18:56,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:18:56,217 INFO L225 Difference]: With dead ends: 108 [2021-05-02 19:18:56,217 INFO L226 Difference]: Without dead ends: 102 [2021-05-02 19:18:56,218 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 103.0ms TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-05-02 19:18:56,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-05-02 19:18:56,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 100. [2021-05-02 19:18:56,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 59 states have (on average 1.152542372881356) internal successors, (68), 62 states have internal predecessors, (68), 28 states have call successors, (28), 13 states have call predecessors, (28), 12 states have return successors, (26), 24 states have call predecessors, (26), 26 states have call successors, (26) [2021-05-02 19:18:56,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 122 transitions. [2021-05-02 19:18:56,223 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 122 transitions. Word has length 61 [2021-05-02 19:18:56,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:18:56,224 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 122 transitions. [2021-05-02 19:18:56,224 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 10 states have internal predecessors, (21), 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 19:18:56,224 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 122 transitions. [2021-05-02 19:18:56,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-02 19:18:56,224 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:18:56,225 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] [2021-05-02 19:18:56,433 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:18:56,433 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:18:56,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:18:56,434 INFO L82 PathProgramCache]: Analyzing trace with hash -1382136022, now seen corresponding path program 1 times [2021-05-02 19:18:56,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:18:56,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835024891] [2021-05-02 19:18:56,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:18:56,441 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:18:56,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2108114510] [2021-05-02 19:18:56,441 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 19:18:56,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:18:56,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 19:18:56,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:18:56,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:56,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:56,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:56,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:56,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:56,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:56,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:56,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:56,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:56,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:56,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:56,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:56,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:56,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:56,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:56,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:56,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:56,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:56,826 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-05-02 19:18:56,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:18:56,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835024891] [2021-05-02 19:18:56,827 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:18:56,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108114510] [2021-05-02 19:18:56,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108114510] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:18:56,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:18:56,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 19:18:56,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637380580] [2021-05-02 19:18:56,827 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 19:18:56,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:18:56,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 19:18:56,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-05-02 19:18:56,828 INFO L87 Difference]: Start difference. First operand 100 states and 122 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 10 states have internal predecessors, (21), 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 19:18:56,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:18:56,993 INFO L93 Difference]: Finished difference Result 121 states and 145 transitions. [2021-05-02 19:18:56,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 19:18:56,995 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 10 states have internal predecessors, (21), 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 64 [2021-05-02 19:18:56,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:18:56,996 INFO L225 Difference]: With dead ends: 121 [2021-05-02 19:18:56,996 INFO L226 Difference]: Without dead ends: 121 [2021-05-02 19:18:56,996 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 109.1ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-05-02 19:18:56,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-05-02 19:18:57,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 119. [2021-05-02 19:18:57,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 73 states have (on average 1.1506849315068493) internal successors, (84), 75 states have internal predecessors, (84), 30 states have call successors, (30), 16 states have call predecessors, (30), 15 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2021-05-02 19:18:57,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 142 transitions. [2021-05-02 19:18:57,001 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 142 transitions. Word has length 64 [2021-05-02 19:18:57,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:18:57,001 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 142 transitions. [2021-05-02 19:18:57,001 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 10 states have internal predecessors, (21), 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 19:18:57,001 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 142 transitions. [2021-05-02 19:18:57,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-02 19:18:57,002 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:18:57,002 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 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 19:18:57,207 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:18:57,207 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:18:57,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:18:57,207 INFO L82 PathProgramCache]: Analyzing trace with hash -718450521, now seen corresponding path program 2 times [2021-05-02 19:18:57,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:18:57,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276497872] [2021-05-02 19:18:57,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:18:57,213 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:18:57,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [387837905] [2021-05-02 19:18:57,213 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 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 19:18:57,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 19:18:57,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:18:57,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-02 19:18:57,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:18:57,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:57,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:57,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:57,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:57,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:57,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:57,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:57,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:57,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:57,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:57,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:57,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:57,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:57,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:57,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:57,459 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 26 proven. 24 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-05-02 19:18:57,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:18:57,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276497872] [2021-05-02 19:18:57,460 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:18:57,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387837905] [2021-05-02 19:18:57,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387837905] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:18:57,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:18:57,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 19:18:57,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101228883] [2021-05-02 19:18:57,460 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 19:18:57,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:18:57,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 19:18:57,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-05-02 19:18:57,461 INFO L87 Difference]: Start difference. First operand 119 states and 142 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 6 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 6 states have call successors, (11) [2021-05-02 19:18:57,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:18:57,636 INFO L93 Difference]: Finished difference Result 124 states and 145 transitions. [2021-05-02 19:18:57,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 19:18:57,637 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 6 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 6 states have call successors, (11) Word has length 69 [2021-05-02 19:18:57,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:18:57,638 INFO L225 Difference]: With dead ends: 124 [2021-05-02 19:18:57,638 INFO L226 Difference]: Without dead ends: 123 [2021-05-02 19:18:57,638 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 91.3ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-05-02 19:18:57,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-05-02 19:18:57,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2021-05-02 19:18:57,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 75 states have (on average 1.12) internal successors, (84), 78 states have internal predecessors, (84), 31 states have call successors, (31), 17 states have call predecessors, (31), 16 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2021-05-02 19:18:57,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 143 transitions. [2021-05-02 19:18:57,644 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 143 transitions. Word has length 69 [2021-05-02 19:18:57,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:18:57,644 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 143 transitions. [2021-05-02 19:18:57,644 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 6 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 6 states have call successors, (11) [2021-05-02 19:18:57,644 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 143 transitions. [2021-05-02 19:18:57,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-02 19:18:57,645 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:18:57,645 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 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 19:18:57,848 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:18:57,849 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:18:57,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:18:57,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1085940318, now seen corresponding path program 1 times [2021-05-02 19:18:57,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:18:57,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048850574] [2021-05-02 19:18:57,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:18:57,856 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:18:57,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [851882039] [2021-05-02 19:18:57,856 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 19:18:57,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:18:57,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-02 19:18:57,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:18:57,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:57,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:57,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:57,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:57,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:57,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:57,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:57,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:57,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:57,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:57,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:57,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:58,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:58,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:58,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:58,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:58,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:58,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:58,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:58,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:58,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:58,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:58,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:58,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:58,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:58,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:58,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:58,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:58,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:58,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:58,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:58,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:18:58,261 WARN L159 QuantifierPusher]: Ignoring assumption.