/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/divbin2_unwindbound20.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 07:42:20,399 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 07:42:20,402 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 07:42:20,448 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 07:42:20,496 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 07:42:20,496 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 07:42:20,497 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 07:42:20,498 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 07:42:20,512 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 07:42:20,513 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 07:42:20,515 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 07:42:20,516 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 07:42:20,516 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 07:42:20,516 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 07:42:20,516 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 07:42:20,516 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 07:42:20,516 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 07:42:20,516 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 07:42:20,517 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 07:42:20,517 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 07:42:20,518 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 07:42:20,518 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 07:42:20,518 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 07:42:20,518 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 07:42:20,518 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 07:42:20,518 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 07:42:20,518 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 07:42:20,519 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 07:42:20,519 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 07:42:20,520 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 07:42:20,520 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 07:42:20,810 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 07:42:20,836 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 07:42:20,838 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 07:42:20,839 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 07:42:20,840 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 07:42:20,841 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/divbin2_unwindbound20.i [2021-05-06 07:42:20,900 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc440dfd8/c265a3c0944c4f51b3dfcac4c4fc4eef/FLAG9393d581c [2021-05-06 07:42:21,299 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 07:42:21,300 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin2_unwindbound20.i [2021-05-06 07:42:21,310 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc440dfd8/c265a3c0944c4f51b3dfcac4c4fc4eef/FLAG9393d581c [2021-05-06 07:42:21,327 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc440dfd8/c265a3c0944c4f51b3dfcac4c4fc4eef [2021-05-06 07:42:21,329 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 07:42:21,332 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 07:42:21,334 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 07:42:21,334 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 07:42:21,337 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 07:42:21,338 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 07:42:21" (1/1) ... [2021-05-06 07:42:21,339 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@612a1095 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:42:21, skipping insertion in model container [2021-05-06 07:42:21,339 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 07:42:21" (1/1) ... [2021-05-06 07:42:21,345 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 07:42:21,360 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 07:42:21,501 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin2_unwindbound20.i[959,972] [2021-05-06 07:42:21,512 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 07:42:21,518 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 07:42:21,573 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin2_unwindbound20.i[959,972] [2021-05-06 07:42:21,589 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 07:42:21,603 INFO L208 MainTranslator]: Completed translation [2021-05-06 07:42:21,603 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:42:21 WrapperNode [2021-05-06 07:42:21,603 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 07:42:21,604 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 07:42:21,604 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 07:42:21,605 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 07:42:21,614 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:42:21" (1/1) ... [2021-05-06 07:42:21,614 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:42:21" (1/1) ... [2021-05-06 07:42:21,621 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:42:21" (1/1) ... [2021-05-06 07:42:21,621 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:42:21" (1/1) ... [2021-05-06 07:42:21,636 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:42:21" (1/1) ... [2021-05-06 07:42:21,640 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:42:21" (1/1) ... [2021-05-06 07:42:21,645 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:42:21" (1/1) ... [2021-05-06 07:42:21,647 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 07:42:21,648 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 07:42:21,648 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 07:42:21,648 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 07:42:21,648 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:42:21" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 07:42:21,723 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 07:42:21,723 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 07:42:21,723 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 07:42:21,723 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 07:42:21,724 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 07:42:21,724 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 07:42:21,724 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 07:42:21,724 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 07:42:21,724 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-06 07:42:21,725 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-06 07:42:21,725 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 07:42:21,725 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 07:42:21,725 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-06 07:42:21,726 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 07:42:21,726 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 07:42:21,726 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 07:42:21,726 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 07:42:21,726 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 07:42:21,727 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 07:42:21,727 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 07:42:21,729 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 07:42:21,729 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 07:42:22,039 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 07:42:22,039 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 07:42:22,040 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:42:22 BoogieIcfgContainer [2021-05-06 07:42:22,040 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 07:42:22,041 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 07:42:22,041 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 07:42:22,041 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 07:42:22,043 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:42:22" (1/1) ... [2021-05-06 07:42:22,054 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 07:42:22 BasicIcfg [2021-05-06 07:42:22,055 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 07:42:22,056 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 07:42:22,056 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 07:42:22,059 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 07:42:22,059 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 07:42:21" (1/4) ... [2021-05-06 07:42:22,059 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a079097 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 07:42:22, skipping insertion in model container [2021-05-06 07:42:22,060 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:42:21" (2/4) ... [2021-05-06 07:42:22,060 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a079097 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 07:42:22, skipping insertion in model container [2021-05-06 07:42:22,060 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:42:22" (3/4) ... [2021-05-06 07:42:22,060 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a079097 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 07:42:22, skipping insertion in model container [2021-05-06 07:42:22,060 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 07:42:22" (4/4) ... [2021-05-06 07:42:22,061 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin2_unwindbound20.iJordan [2021-05-06 07:42:22,066 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 07:42:22,069 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 07:42:22,085 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 07:42:22,106 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 07:42:22,106 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 07:42:22,106 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 07:42:22,106 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 07:42:22,106 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 07:42:22,106 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 07:42:22,106 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 07:42:22,107 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 07:42:22,117 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 07:42:22,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 07:42:22,122 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:42:22,123 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:42:22,123 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:42:22,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:42:22,127 INFO L82 PathProgramCache]: Analyzing trace with hash 2097950667, now seen corresponding path program 1 times [2021-05-06 07:42:22,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:42:22,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042536033] [2021-05-06 07:42:22,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:42:22,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:42:22,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 07:42:22,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:42:22,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 07:42:22,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:42:22,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042536033] [2021-05-06 07:42:22,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042536033] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:42:22,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:42:22,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 07:42:22,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306170318] [2021-05-06 07:42:22,375 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 07:42:22,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:42:22,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 07:42:22,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 07:42:22,388 INFO L87 Difference]: Start difference. First operand has 26 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 07:42:22,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:42:22,467 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2021-05-06 07:42:22,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 07:42:22,468 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-06 07:42:22,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:42:22,475 INFO L225 Difference]: With dead ends: 27 [2021-05-06 07:42:22,476 INFO L226 Difference]: Without dead ends: 22 [2021-05-06 07:42:22,477 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 52.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 07:42:22,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-05-06 07:42:22,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2021-05-06 07:42:22,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 07:42:22,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2021-05-06 07:42:22,502 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 12 [2021-05-06 07:42:22,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:42:22,502 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2021-05-06 07:42:22,502 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 07:42:22,503 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2021-05-06 07:42:22,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-06 07:42:22,503 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:42:22,503 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:42:22,504 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 07:42:22,504 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:42:22,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:42:22,505 INFO L82 PathProgramCache]: Analyzing trace with hash 923003056, now seen corresponding path program 1 times [2021-05-06 07:42:22,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:42:22,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450426167] [2021-05-06 07:42:22,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:42:22,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:42:22,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 07:42:22,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:42:22,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 07:42:22,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:42:22,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450426167] [2021-05-06 07:42:22,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450426167] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:42:22,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:42:22,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 07:42:22,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515795693] [2021-05-06 07:42:22,614 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 07:42:22,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:42:22,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 07:42:22,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 07:42:22,616 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 07:42:22,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:42:22,756 INFO L93 Difference]: Finished difference Result 23 states and 28 transitions. [2021-05-06 07:42:22,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 07:42:22,756 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-05-06 07:42:22,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:42:22,757 INFO L225 Difference]: With dead ends: 23 [2021-05-06 07:42:22,757 INFO L226 Difference]: Without dead ends: 23 [2021-05-06 07:42:22,758 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 70.5ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:42:22,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-05-06 07:42:22,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-05-06 07:42:22,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 07:42:22,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2021-05-06 07:42:22,761 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 14 [2021-05-06 07:42:22,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:42:22,761 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2021-05-06 07:42:22,762 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 07:42:22,762 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2021-05-06 07:42:22,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-06 07:42:22,762 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:42:22,762 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:42:22,762 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 07:42:22,762 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:42:22,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:42:22,763 INFO L82 PathProgramCache]: Analyzing trace with hash 1207414063, now seen corresponding path program 1 times [2021-05-06 07:42:22,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:42:22,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256269435] [2021-05-06 07:42:22,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:42:22,790 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:42:22,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1227522942] [2021-05-06 07:42:22,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:42:22,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:42:22,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 07:42:22,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:42:22,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:22,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:22,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:22,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:22,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:22,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:22,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:22,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:22,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 07:42:22,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:42:22,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256269435] [2021-05-06 07:42:22,964 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:42:22,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227522942] [2021-05-06 07:42:22,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227522942] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:42:22,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:42:22,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 07:42:22,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575682295] [2021-05-06 07:42:22,965 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 07:42:22,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:42:22,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 07:42:22,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 07:42:22,966 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 07:42:22,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:42:22,998 INFO L93 Difference]: Finished difference Result 27 states and 33 transitions. [2021-05-06 07:42:23,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 07:42:23,002 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-05-06 07:42:23,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:42:23,002 INFO L225 Difference]: With dead ends: 27 [2021-05-06 07:42:23,003 INFO L226 Difference]: Without dead ends: 27 [2021-05-06 07:42:23,003 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 10.8ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 07:42:23,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-06 07:42:23,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2021-05-06 07:42:23,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 07:42:23,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2021-05-06 07:42:23,007 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 15 [2021-05-06 07:42:23,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:42:23,007 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2021-05-06 07:42:23,007 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 07:42:23,008 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2021-05-06 07:42:23,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-06 07:42:23,008 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:42:23,008 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:42:23,232 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-06 07:42:23,232 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:42:23,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:42:23,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1208546121, now seen corresponding path program 1 times [2021-05-06 07:42:23,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:42:23,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689577570] [2021-05-06 07:42:23,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:42:23,243 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:42:23,243 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1319631174] [2021-05-06 07:42:23,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:42:23,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:42:23,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 07:42:23,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:42:23,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:23,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:23,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:23,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 07:42:23,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:42:23,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689577570] [2021-05-06 07:42:23,476 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:42:23,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319631174] [2021-05-06 07:42:23,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319631174] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:42:23,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:42:23,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 07:42:23,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833191536] [2021-05-06 07:42:23,476 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 07:42:23,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:42:23,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 07:42:23,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:42:23,477 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 07:42:23,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:42:23,524 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2021-05-06 07:42:23,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 07:42:23,524 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-05-06 07:42:23,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:42:23,525 INFO L225 Difference]: With dead ends: 33 [2021-05-06 07:42:23,525 INFO L226 Difference]: Without dead ends: 32 [2021-05-06 07:42:23,526 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 37.1ms TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-06 07:42:23,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-06 07:42:23,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-06 07:42:23,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 07:42:23,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2021-05-06 07:42:23,530 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 15 [2021-05-06 07:42:23,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:42:23,530 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2021-05-06 07:42:23,531 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 07:42:23,531 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2021-05-06 07:42:23,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 07:42:23,531 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:42:23,531 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:42:23,754 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:42:23,755 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:42:23,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:42:23,755 INFO L82 PathProgramCache]: Analyzing trace with hash 1227316531, now seen corresponding path program 1 times [2021-05-06 07:42:23,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:42:23,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046205373] [2021-05-06 07:42:23,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:42:23,769 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:42:23,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [76065158] [2021-05-06 07:42:23,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:42:23,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:42:23,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 07:42:23,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:42:23,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:23,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:23,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:23,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:23,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:23,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:23,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:23,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:23,936 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 07:42:23,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:42:23,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046205373] [2021-05-06 07:42:23,936 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:42:23,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76065158] [2021-05-06 07:42:23,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76065158] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:42:23,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:42:23,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-06 07:42:23,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529507235] [2021-05-06 07:42:23,937 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 07:42:23,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:42:23,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 07:42:23,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 07:42:23,938 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 07:42:23,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:42:23,969 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2021-05-06 07:42:23,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 07:42:23,969 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-05-06 07:42:23,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:42:23,970 INFO L225 Difference]: With dead ends: 34 [2021-05-06 07:42:23,970 INFO L226 Difference]: Without dead ends: 34 [2021-05-06 07:42:23,970 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 15.6ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:42:23,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-06 07:42:23,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-05-06 07:42:23,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 25 states have (on average 1.28) internal successors, (32), 26 states have internal predecessors, (32), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 07:42:23,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2021-05-06 07:42:23,975 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 17 [2021-05-06 07:42:23,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:42:23,976 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2021-05-06 07:42:23,976 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 07:42:23,976 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2021-05-06 07:42:23,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 07:42:23,979 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:42:23,979 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:42:24,204 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:42:24,205 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:42:24,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:42:24,205 INFO L82 PathProgramCache]: Analyzing trace with hash 2051197196, now seen corresponding path program 1 times [2021-05-06 07:42:24,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:42:24,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669311050] [2021-05-06 07:42:24,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:42:24,223 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:42:24,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1153431227] [2021-05-06 07:42:24,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:42:24,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:42:24,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 07:42:24,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:42:24,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:24,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:24,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:24,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:24,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:24,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:24,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:24,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:24,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:24,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:24,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:24,436 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 07:42:24,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:42:24,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669311050] [2021-05-06 07:42:24,436 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:42:24,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153431227] [2021-05-06 07:42:24,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153431227] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:42:24,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:42:24,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 07:42:24,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566997005] [2021-05-06 07:42:24,437 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 07:42:24,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:42:24,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 07:42:24,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:42:24,439 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 07:42:24,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:42:24,481 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2021-05-06 07:42:24,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 07:42:24,482 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-05-06 07:42:24,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:42:24,484 INFO L225 Difference]: With dead ends: 39 [2021-05-06 07:42:24,484 INFO L226 Difference]: Without dead ends: 39 [2021-05-06 07:42:24,487 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 23.4ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-05-06 07:42:24,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-06 07:42:24,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2021-05-06 07:42:24,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 30 states have internal predecessors, (38), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 07:42:24,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2021-05-06 07:42:24,500 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 18 [2021-05-06 07:42:24,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:42:24,501 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2021-05-06 07:42:24,501 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 07:42:24,501 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2021-05-06 07:42:24,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 07:42:24,502 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:42:24,502 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:42:24,716 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:42:24,717 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:42:24,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:42:24,718 INFO L82 PathProgramCache]: Analyzing trace with hash 2052329254, now seen corresponding path program 1 times [2021-05-06 07:42:24,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:42:24,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165034271] [2021-05-06 07:42:24,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:42:24,728 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:42:24,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [408886836] [2021-05-06 07:42:24,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:42:24,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:42:24,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 07:42:24,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:42:24,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:24,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:24,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:24,938 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 07:42:24,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:42:24,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165034271] [2021-05-06 07:42:24,938 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:42:24,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408886836] [2021-05-06 07:42:24,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408886836] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:42:24,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:42:24,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 07:42:24,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870069627] [2021-05-06 07:42:24,942 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 07:42:24,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:42:24,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 07:42:24,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:42:24,944 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 07:42:25,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:42:25,022 INFO L93 Difference]: Finished difference Result 50 states and 61 transitions. [2021-05-06 07:42:25,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 07:42:25,022 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-05-06 07:42:25,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:42:25,023 INFO L225 Difference]: With dead ends: 50 [2021-05-06 07:42:25,023 INFO L226 Difference]: Without dead ends: 49 [2021-05-06 07:42:25,023 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.7ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 07:42:25,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-06 07:42:25,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2021-05-06 07:42:25,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 36 states have internal predecessors, (44), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 07:42:25,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2021-05-06 07:42:25,027 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 18 [2021-05-06 07:42:25,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:42:25,028 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2021-05-06 07:42:25,028 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 07:42:25,028 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2021-05-06 07:42:25,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-06 07:42:25,029 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:42:25,029 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:42:25,252 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-06 07:42:25,252 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:42:25,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:42:25,253 INFO L82 PathProgramCache]: Analyzing trace with hash 462666167, now seen corresponding path program 1 times [2021-05-06 07:42:25,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:42:25,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322178487] [2021-05-06 07:42:25,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:42:25,261 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:42:25,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1292720529] [2021-05-06 07:42:25,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:42:25,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:42:25,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 07:42:25,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:42:25,375 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 07:42:25,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:42:25,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322178487] [2021-05-06 07:42:25,376 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:42:25,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292720529] [2021-05-06 07:42:25,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292720529] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:42:25,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:42:25,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 07:42:25,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719830070] [2021-05-06 07:42:25,377 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 07:42:25,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:42:25,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 07:42:25,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 07:42:25,379 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 07:42:25,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:42:25,390 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2021-05-06 07:42:25,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 07:42:25,390 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2021-05-06 07:42:25,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:42:25,391 INFO L225 Difference]: With dead ends: 43 [2021-05-06 07:42:25,391 INFO L226 Difference]: Without dead ends: 35 [2021-05-06 07:42:25,391 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 07:42:25,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-06 07:42:25,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-06 07:42:25,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 27 states have internal predecessors, (33), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 07:42:25,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2021-05-06 07:42:25,394 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 24 [2021-05-06 07:42:25,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:42:25,394 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2021-05-06 07:42:25,394 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 07:42:25,394 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2021-05-06 07:42:25,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-06 07:42:25,395 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:42:25,395 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:42:25,616 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:42:25,616 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:42:25,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:42:25,617 INFO L82 PathProgramCache]: Analyzing trace with hash -269721504, now seen corresponding path program 1 times [2021-05-06 07:42:25,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:42:25,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283766892] [2021-05-06 07:42:25,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:42:25,632 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:42:25,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [729418143] [2021-05-06 07:42:25,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:42:25,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:42:25,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 07:42:25,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:42:25,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:25,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:25,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:25,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:25,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:25,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:25,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:25,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:25,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:25,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:25,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:25,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:25,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:25,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:42:25,814 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 07:42:25,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:42:25,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283766892] [2021-05-06 07:42:25,815 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:42:25,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729418143] [2021-05-06 07:42:25,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729418143] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:42:25,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:42:25,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 07:42:25,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657550036] [2021-05-06 07:42:25,816 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 07:42:25,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:42:25,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 07:42:25,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 07:42:25,816 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 07:42:25,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:42:25,858 INFO L93 Difference]: Finished difference Result 53 states and 63 transitions. [2021-05-06 07:42:25,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 07:42:25,859 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2021-05-06 07:42:25,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:42:25,860 INFO L225 Difference]: With dead ends: 53 [2021-05-06 07:42:25,860 INFO L226 Difference]: Without dead ends: 53 [2021-05-06 07:42:25,860 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 41.6ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-06 07:42:25,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-05-06 07:42:25,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 47. [2021-05-06 07:42:25,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 36 states have (on average 1.25) internal successors, (45), 37 states have internal predecessors, (45), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 07:42:25,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2021-05-06 07:42:25,871 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 27 [2021-05-06 07:42:25,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:42:25,871 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2021-05-06 07:42:25,871 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 07:42:25,872 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2021-05-06 07:42:25,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-06 07:42:25,872 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:42:25,872 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:42:26,072 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:42:26,073 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:42:26,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:42:26,074 INFO L82 PathProgramCache]: Analyzing trace with hash -268589446, now seen corresponding path program 1 times [2021-05-06 07:42:26,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:42:26,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000472120] [2021-05-06 07:42:26,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:42:26,082 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:42:26,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [971567699] [2021-05-06 07:42:26,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true